Top 10 Best Spark Plug Gapper That Will Boost Engine Power!

Many people working on vehicle maintenance often overlook the importance of setting the correct gap on spark plugs. Incorrect gaps can lead to misfires, reduced fuel efficiency, and engine performance issues.

This tool is designed for mechanics and DIY car owners who want accurate results without guesswork. The best spark plug gapper offers straightforward use, durability, and consistency when measuring the gap.

With the right tool, you can maintain your engine’s health and avoid costly repairs down the road. This review will cover key features to look for, user experiences, and how to choose a spark plug gapper that fits your needs. Whether you work on cars regularly or just need a reliable tool for occasional use, this guide will help you make an informed decision.

Whether you work on cars regularly or just need a reliable tool for occasional use, this guide will help you make an informed decision.

Find the Perfect Spark Plug Fit with These Top Gap Setting Tools

Image	Product	Price
Pick 1	CTA Tools 3235 Spark Plug Gapper	Check Price
Pick 2	Spark Plug Gap Tool with Steel Feeler Gauge – Red	Check Price
Pick 3	Toolwiz Spark Plug Gap Tool with Steel Feeler Gauge	Check Price

1. CTA Tools 3235 Spark Plug Gapper

Maintaining the precise gap on spark plugs is vital for engine efficiency and performance. The CTA Tools 3235 Spark Plug Gapper offers a straightforward way to check and adjust spark plug gaps with ease.

Designed for professionals and home mechanics alike, this tool combines durability with user-friendly functionality. Its ramp-type design ensures consistent and accurate measurements every time.

The CTA Tools 3235 Ramp-Type Spark Plug Gapper stands out due to its robust construction and professional-grade quality. Made with heavy-duty materials, it resists wear and flexing, allowing repeated use without damage. This tool covers a wide range of spark plug gap sizes, making it versatile for many automotive jobs.

This tool covers a wide range of spark plug gap sizes, making it versatile for many automotive jobs.

Its ramp design allows the user to place the spark plug gap on a sloped surface, measuring the gap precisely without risk of error. The lightweight yet hardy build makes it portable and easy to handle, even in tight engine compartments.

Unlike some basic feeler gauges, this gapper prevents misreads by providing a visual and tactile reference. It suits mechanics, automotive hobbyists, and anyone who needs rapid, consistent spark plug adjustments. Its resilience and flexibility extend the tool’s service life, representing excellent value for projects requiring regular gap calibration.

Its resilience and flexibility extend the tool’s service life, representing excellent value for projects requiring regular gap calibration.

Pros

• Heavy-duty design resists bending and wear for long-term use
• Ramp-type gauge delivers precise and easy-to-read measurements
• Suitable for a broad selection of spark plug gap sizes

Cons

• Single ramp gauge may require manual interpretation compared to digital gap tools

With its sturdy design and straightforward operation, the CTA Tools 3235 Spark Plug Gapper is a reliable choice for accurate spark plug maintenance. It balances durability and functionality efficiently, meeting the demands of automotive users who value precision and tool longevity.

2. Spark Plug Gap Tool with Steel Feeler Gauge – Red

Achieve precise spark plug gaps effortlessly with the Spark Plug Gap Tool equipped with a steel feeler gauge. This reliable tool fits a wide range of standard spark plugs, offering convenience and accuracy in one compact package.

Designed for simplicity and durability, it ensures your engine runs smoothly by delivering exact gap adjustments. The bright red finish makes it easy to locate in any toolbox or workshop.

The Spark Plug Gap Tool is compatible with most 14mm, 12mm, 10mm, and 16mm standard spark plugs, accommodating non-preset gap types. It does not fit 18mm thread or plugs with long or short reaches, focusing on the most common sizes instead.

This tool provides consistent results without risking damage to the spark plug coating.

Its steel feeler gauge measures between 001inch and 040inch, made from flexible 65 manganese steel, hardened for long-lasting precision. The included knob allows gradual adjustments, preventing over-tightening and wear on the electrodes.

An easy-to-follow adjustment process saves time and effort, even for beginners.

Users receive a comprehensive kit: the gap tool, a feeler gauge, and gloves for safe handling. This combination ensures accurate gap settings, enhancing engine performance and fuel efficiency. Ideal for DIY mechanics and professional technicians seeking dependable and straightforward tuning solutions.

Pros

• Universal fit for various standard spark plug sizes
• Durable steel feeler gauge with precise measurements
• Simple and safe adjustment mechanism to protect spark plugs

Cons

• Not compatible with 18mm thread or extreme reach spark plugs

This spark plug gap tool stands out as an effective and budget-friendly solution for achieving precise ignition settings. Its thoughtful design and included accessories make it a valuable addition to any automotive toolkit. Compared to similar tools, it offers reliable usability without unnecessary complexity, perfect for both occasional and regular maintenance.

Compared to similar tools, it offers reliable usability without unnecessary complexity, perfect for both occasional and regular maintenance.

3. Toolwiz Spark Plug Gap Tool with Steel Feeler Gauge

Accurately setting spark plug gaps can significantly impact engine performance. The Toolwiz Spark Plug Gap Tool with Steel Feeler Gauge makes this task straightforward and precise. Designed to adjust most standard spark plugs, it offers a reliable solution for both professionals and DIY mechanics.

With its easy-to-use design and sturdy build, this tool simplifies the process of achieving the right gap without hassle. Whether maintaining your vehicle or tuning up equipment, it provides the consistency needed for optimal ignition.

Compatible with a wide range of spark plugs, the Toolwiz gap tool supports 10mm, 12mm, 14mm, and 16mm thread sizes. Long reach and 18mm plugs are not supported, focusing on the most commonly used types.

Adjusting the gap is quick and convenient. Place the spark plug into the tool, select the desired feeler gauge, and gently turn the knob until the electrode compresses to the correct spacing. Note that it only reduces the gap and cannot enlarge it.

To get an accurate setting, using a slightly smaller feeler gauge than the target gap helps prevent spring-back issues.

Included with the tool is a durable, dual-marked feeler gauge made from 65 manganese steel. This gauge is hardened and polished to retain precise measurements over time, ranging from 001 to 040 (03 mm to 0 mm). The compact package contains both the spark plug gap tool and a 32-blade feeler gauge, ready for immediate use.

The compact package contains both the spark plug gap tool and a 32-blade feeler gauge, ready for immediate use. Crafted with a smooth exterior for comfortable handling, it offers a reliable, long-lasting adjustment method that suits both casual users and professionals striving for consistent results.

Pros

• Wide compatibility with standard spark plug sizes
• Includes a durable, dual-marked steel feeler gauge
• Simple and effective manual gap adjustment

Cons

• Cannot increase the spark plug gap, only reduces it

This spark plug gap tool offers reliable, straightforward performance for a variety of standard plugs. Its durable materials and thoughtful design help users achieve precise gaps quickly.

While it only reduces gaps, it remains a practical and valuable tool for many automotive tune-ups and repairs.

4. Universal Spark Plug Gap Tool with 32-Blade Feeler Gauge

Enhance your vehicle’s performance by precisely adjusting your spark plug gaps with the Universal Spark Plug Gap Tool. Designed for a wide range of standard spark plugs, this tool simplifies the gapping process for smooth engine operation. Its durable construction and easy-to-use design make it a reliable choice for quick adjustments.

Whether you are a DIY mechanic or a professional, this spark plug gapping tool offers accuracy and convenience. Its compact size allows for easy handling and storage, making maintenance on the go much simpler. Enjoy consistent ignition and improved engine efficiency with a tool built for precise results.

Engineered with a high-quality aluminum body, this spark plug gapper provides durability alongside an ergonomic matte texture for a secure grip. It fits most standard 10mm, 12mm, 14mm, and 16mm spark plugs, excluding 18mm thread sizes. Simply mount the spark plug and select the appropriate feeler blade to adjust gaps accurately.

Simply mount the spark plug and select the appropriate feeler blade to adjust gaps accurately.

The included 32-blade feeler gauge, crafted from manganese steel, covers measurements from 0015 inch (04mm) to 035 inch (88mm). For users with electronic ignitions, a dedicated 010 inch (25mm) brass blade is also included.

The knob mechanism allows gradual, precise tuning up to your desired spark plug gap.

This tool is ideal for mechanics and car owners who want a precise, hassle-free gapping experience. It is not suitable for long reach or short reach spark plugs, so users should verify plug dimensions beforehand. Its lightweight design (only 07 grams) and high ranking (#21 in Spark Plug & Ignition Tools) underline its trusted performance and popularity.

Pros

• Wide compatibility with standard spark plug sizes (10mm to 16mm)
• 32-blade feeler gauge offering extensive measurement options
• Durable aluminum body with matte texture for comfortable use

Cons

• Not compatible with long reach or short reach spark plugs

This Universal Spark Plug Gap Tool combines precision, versatility, and ease of use, making it a valuable addition to any automotive toolkit. Its thoughtful design and range of features enable accurate spark plug adjustments that can improve engine performance.

5. CTA Tools 3238 Wire Spark Plug Gap Gauge

Enhance your automotive maintenance toolkit with the CTA Tools 3238 Wire Spark Plug Gap Gauge. This precise measuring tool is designed to help you achieve the perfect spark plug gap for improved engine performance. Its array of wire sizes ensures compatibility with a wide variety of spark plugs for accurate adjustments.

Durability and accuracy define this gauge, making it an essential addition for both home mechanics and professionals. Designed for convenience and longevity, it simplifies the task of maintaining optimal spark plug gaps that contribute to smoother starts and efficient fuel consumption.

Measuring spark plug gaps has never been easier with the CTA Tools 3238 gauge. It features nine different wire sizes ranging from 025 to 060 inches, covering the most common gap specifications for vehicles.

The compact, lightweight design allows for effortless handling and high precision when setting or checking gaps. Its professional-grade build ensures that it can handle both routine checks and challenging automotive projects.

Ideal for mechanics, car owners, and automotive technicians, this gauge supports maintaining engine efficiency and preventing misfires. It delivers value through its durable construction and comprehensive size range, outperforming many similar tools that offer fewer gap options or less robust materials.

Pros

• Includes nine wire sizes to fit a broad range of spark plugs
• Heavy-duty construction ensures longevity and reliability
• Compact and easy to use, perfect for professionals and DIY mechanics

Cons

• Contains chemicals listed under California Proposition 65 requiring user caution

The CTA Tools 3238 Wire Spark Plug Gap Gauge offers dependable precision with durable construction, making it a smart choice for anyone working on spark plug maintenance. Its wide range of sizes helps cover more vehicles than many competitors, providing excellent control over engine tuning.

6. Spark Plug Gapper Zinc Alloy Measuring Tool

Experience enhanced precision in your automotive maintenance with the Spark Plug Gapper Zinc Alloy Measuring Tool. This compact device simplifies the task of adjusting spark plug gaps, ensuring your vehicle runs smoothly and efficiently.

Designed for durability and accuracy, the gapper caters to both professional mechanics and car owners alike. Its dual-scale measurements in inches and millimeters meet diverse needs, making it a practical addition to any toolkit.

The Spark Plug Gapper features clear, easy-to-read graduations engraved on a robust zinc alloy body. Its smooth surface allows for swift, precise measurements without the hassle of guessing.

A clever hanging hole on the top lets you attach it to keyrings or backpacks, reducing the risk of misplacement during outings or repairs. The tool is well-suited for measuring cylindrical objects, overcoming typical challenges associated with spark plug gap adjustments.

Built to withstand wear, this gauge resists corrosion and weather effects, maintaining its accuracy and aesthetic appeal over time. Polished edges provide safety and prevent damage to hands or vehicle parts when making fine adjustments.

Grooved edges aid in smooth, controlled gap adjustments that promote comfortable driving and better engine performance. This gapper stands out for its balance of durability, functionality, and ease of use compared to similar measuring tools, making it a smart choice for accurate automotive maintenance.

Pros

• Dual measurement scales for versatile gap readings
• Durable zinc alloy resists corrosion and wear
• Compact, lightweight design with hanging hole for easy access

Cons

• Limited to measuring smaller spark plugs due to compact size

Overall, the Spark Plug Gapper Zinc Alloy Measuring Tool combines practicality and durability to offer reliable spark plug adjustment. It ensures accurate measurements and easy handling, supporting better vehicle performance in a convenient, well-crafted design.

7. A & E Hand Tools 4450A E-Z Grip Spark Plug Gap Gauge

Reliable spark plug adjustment is a key factor in maintaining engine efficiency. The A & E Hand Tools 4450A E-Z Grip Spark Plug Gap Gauge offers a practical solution with its intuitive design and precise measurements.

Its compact size and pocket clip make it easy to carry around during tune-ups. The tool is tailored to simplify adjusting spark plug electrodes, ensuring optimal engine performance every time.

Designed with both professional mechanics and DIY users in mind, this spark plug gap gauge is a handy addition to any toolkit. The reverse side features a clear metric gapping scale, accommodating various automotive standards with ease.

The compact dimensions of 7 x 4 x 5 inches and light weight of just 8 ounces enhance portability without compromising durability. Made by A & E Hand Tools, known for quality tooling, it ensures reliable, consistent results with each use. Its ergonomic grip minimizes hand fatigue during repetitive adjustments, allowing precise control.

Built with user convenience in mind, the pocket clip secures the tool within reach during workshops or on the go. Whether applied in casual maintenance or detailed repair work, the gauge offers accurate readings and fine tuning. It stands competitive against other gap gauges due to its combination of durability, practicality, and user-friendly features.

Pros

• Compact design with pocket clip for easy portability
• Metric scale on reverse side for versatile measurements
• Built-in recess tailored for efficient electrode adjustments

Cons

• Made in China, which may concern some preferring locally manufactured tools

The A & E Hand Tools 4450A E-Z Grip Spark Plug Gap Gauge delivers reliable accuracy and thoughtful design. It balances ease of use with essential features, offering lasting value for effective spark plug maintenance.

8. Universal Spark Plug Gap Tool with Steel Feeler Gauge

Adjusting spark plug gaps accurately makes a big difference in engine performance. The Universal Spark Plug Gap Tool with Steel Feeler Gauge is built to deliver precise measurements and easy adjustments for a wide range of spark plugs.

Crafted to fit common spark plug sizes from 10 mm to 16 mm, this tool offers convenience and compatibility. The included 32-blade feeler gauge covers a broad range from 0015 to 035 inches, allowing exact gap calibration.

The set’s manganese steel feeler gauges resist corrosion and wear, providing consistent readings over time. It features a sturdy aluminum body that can withstand frequent use without bending or breaking.

Adjusting the gap involves placing the spark plug, selecting the gauge, and tightening the knob to compress the electrode—no specialized skills required.

Some spark plug electrodes may spring back slightly during adjustment. For this reason, using a slightly smaller gauge than your target gap ensures accurate final spacing.

Its compact size makes it easy to carry in any toolbox or garage drawer. This tool is particularly useful for car owners and mechanics seeking precision without hassle.

When compared to plastic or single-gauge tools, this model offers more versatility and lasting performance. The comprehensive range of blades offers better adaptability to different engines, making it a practical choice for routine tuning and repairs. It represents reliable precision at home or on the job.

Pros

• Compatible with multiple spark plug sizes: 10 mm to 16 mm
• Includes 32 manganese steel feeler blades with precise measurement range
• Durable aluminum construction ensures long-lasting use

Cons

• Electrode spring-back may require careful gauge selection

This universal gap tool balances durability, accuracy, and ease of use. It fits various spark plug sizes and offers detailed calibration options, making it a trusted companion for vehicle maintenance and repairs.

9. Spark Plug Gap Tool 2-in-1 Set with Feeler Gauge

Maintaining the correct spark plug gap is vital for engine efficiency and smooth performance. The Spark Plug Gap Tool 2-in-1 Set with Feeler Gauge offers a simple yet effective solution for precise gap measurement and adjustment. This combination toolset ensures your spark plugs are perfectly set for optimal ignition every time.

Designed with convenience in mind, it brings together a spark plug gap tool and a detailed feeler gauge kit. Whether working on standard spark plugs or performing routine maintenance, this toolset covers your needs efficiently. Its compact and durable design makes it a reliable addition to any automotive toolkit.

The set features a 2-in-1 design, including one spark plug gap tool and 32 feeler gauges. The feeler gauges cover a wide measuring range from 04mm to 88mm, ensuring compatibility with most spark plug sizes. Both metric and imperial units are displayed, catering to different user preferences and making readings straightforward.

Constructed from high-quality stainless steel and aluminum alloy, durability is a key focus. The spark plug gapper resists wear and maintains accuracy after frequent use. Adjusting spark plug gaps is effortless—simply insert the spark plug, turn the knob gently to the desired gap, and verify with the feeler gauge.

While it accommodates standard 10mm to 16mm spark plugs, it does not fit 18mm or long/short reach plugs. Its sturdy build and easy-to-read scales make it ideal for both DIYers and professional mechanics.

Pros

• Comprehensive 2-in-1 set with spark plug tool and 32 precise feeler gauges
• Durable stainless steel and aluminum construction for long-lasting accuracy
• Suitable for a wide range of standard spark plug sizes with dual scale readouts

Cons

• Not compatible with 18mm spark plugs and certain long or short reach plugs

Offering precise adjustments and a full measurement range, this spark plug gapper set stands out for quality and ease of use. Its well-rounded design supports accurate engine maintenance with durability that lasts.

10. Spark Plug Gap Tool with Steel Feeler Gauge – SparkPlugPro

Maintaining the right spark plug gap is essential for efficient engine performance and fuel economy. The Spark Plug Gap Tool with Steel Feeler Gauge by SparkPlugPro offers precise adjustments, making routine vehicle tune-ups simpler and more accurate.

Designed for compatibility with most common spark plug sizes, this tool combines durability with user-friendly functionality. It is an ideal accessory for both professional mechanics and DIY vehicle owners who want reliable, hassle-free maintenance.

This universal gap tool fits spark plugs sized 10mm, 12mm, 14mm, and 16mm, covering the majority of vehicles. Its steel feeler gauge assures accurate measurement and consistent gap settings for improved ignition efficiency.

Crafted from sturdy, premium materials, the tool withstands frequent use without losing precision or breaking. Its compact size and simple design make adjustments quick and straightforward, preventing wasted time during maintenance.

The spark plug gapper also addresses electrode spring-back by recommending slightly smaller initial settings for better final fit.

Compared to plastic or less specialized gappers, this model offers enhanced reliability and long-term value. It suits car owners who prefer hands-on servicing and need a trustworthy instrument that delivers consistent spark plug gaps.

Its practical design eliminates guesswork, boosting engine performance and helping vehicles run smoothly.

Pros

• Universal compatibility with multiple common spark plug sizes
• Durable steel feeler gauge for precise measurements
• Easy to use, saving time during engine tuning and maintenance

Cons

• Not compatible with 18mm thread or long-reach spark plugs

The Spark Plug Gap Tool with Steel Feeler Gauge offers dependable precision and convenient design for anyone maintaining spark plugs. It stands out for accuracy and durability, making spark plug adjustments less troublesome and more effective compared to basic gapping tools.

Things to Consider Before Buying the Best Spark Plug Gapper

Understanding spark plug gappers

A spark plug gapper serves as a precise tool designed to measure and adjust the gap between the center and ground electrodes of a spark plug. This adjustment plays a key role in achieving efficient engine performance and reliable ignition.

Various types of gapper tools are available, including wire gauges, coin style feelers, and adjustable gap tools, each offering different levels of precision and ease of use. Wire gauges consist of thin, flexible wires of varying thicknesses that slide between the electrodes to check the gap size, while coin style feelers are flat and easier to handle for quick measurements. Adjustable tools often feature a flat surface to widen or narrow the gap carefully.

Accurate measurement of the spark plug gap is important because too wide or too narrow a gap can cause engine misfires, reduced fuel efficiency, and increased emissions. Understanding how to measure and set the gap correctly helps maintain smooth engine operation and prolongs the life of the spark plug itself, making this tool a valuable component for anyone involved in basic vehicle maintenance or engine tuning.

Material and build quality

The best spark plug gapper typically features materials designed to last through repeated use without succumbing to rust or wear, contributing to a tool that remains reliable over time. Resistance to corrosion plays a key role in maintaining accuracy and functionality, especially given the exposure to various automotive chemicals and environmental conditions. An ergonomic design enhances comfort and ease during adjustments, allowing users to achieve precise spark plug gaps without hand fatigue or slipping.

An ergonomic design enhances comfort and ease during adjustments, allowing users to achieve precise spark plug gaps without hand fatigue or slipping. Smooth operation and a sturdy build come together to offer a tool that is both practical for occasional tasks and durable enough for frequent applications in different automotive settings.

Measurement accuracy and range

The best spark plug gapper typically offers precise levels of measurement to help achieve the exact gap needed for efficient engine performance. Adjustable gap settings make it versatile, allowing users to set the gap width accurately according to manufacturer specifications or personal preferences. Compatibility with different spark plug sizes ensures that the tool can be used across a wide range of vehicles and engines, making it a practical choice for various applications.

Compatibility with different spark plug sizes ensures that the tool can be used across a wide range of vehicles and engines, making it a practical choice for various applications. These features combine to provide reliable adjustments that contribute to better ignition and overall engine health.

Ease of use and portability

The best spark plug gapper often features intuitive mechanisms that simplify the process of measuring and adjusting the gap, making it userfriendly for those new to automotive maintenance. Compact design and lightweight materials contribute to its ease of handling, allowing it to fit comfortably in one hand without causing fatigue during use.

This compactness also aids in portability, enabling users to carry the tool conveniently in a small toolbox or pouch, which is especially helpful for onthego situations like roadside repairs or mobile workshops. The balance between a sturdy build and lightweight construction enhances the overall experience by providing reliable performance without being cumbersome to transport or store.

Additional features and accessories

Additional features and accessories can greatly enhance the usability of the best spark plug gapper, especially those that come with built-in gap adjustment tools for precise and easy calibration. Many models include a storage case or protective cover, helping keep the tool safe and organized when not in use. Some spark plug gappers offer extra functionalities such as multitool integration, combining various handy tools in one compact device for convenience during maintenance tasks.

These supplementary elements streamline the process of setting the correct gap and maintaining spark plugs efficiently, making the overall experience more user-friendly and practical.

Price and warranty considerations

Balancing budget and quality plays a significant role when choosing the best spark plug gapper since a reliable tool often lasts longer and offers more precise adjustments. Opting for a product from a reputable brand can provide added confidence, as user reviews generally reflect consistent performance and durability. Good warranty coverage paired with responsive customer support adds value by protecting the investment and addressing any potential issues quickly, making the purchase more satisfying in the long run.

Good warranty coverage paired with responsive customer support adds value by protecting the investment and addressing any potential issues quickly, making the purchase more satisfying in the long run. Paying attention to these aspects ensures a harmonious blend of affordability, reliability, and post-purchase assistance for a smoother experience.

FAQ’s

What Is The Best Spark Plug Gapper For Precise Adjustments?

The best spark plug gapper for precise adjustments is a wire-type or coin-style gapper with clear measurement markings, such as the Accu-Gage or OEM-approved gap tools. These tools allow for accurate and consistent gap settings, ensuring optimal engine performance.

How Do Different Types Of Spark Plug Gappers Compare In Accuracy And Durability?

Different types of spark plug gappers vary in accuracy and durability, with wire-type gappers offering precise adjustments but wearing out faster, while coin-type and thickness gauge gappers provide consistent measurements and greater durability. Overall, selecting a gapper depends on balancing the need for accuracy with the tool’s longevity.

What Features Should I Look For When Choosing A Spark Plug Gapper?

When choosing a spark plug gapper, look for features like adjustable and precise gap settings to ensure accurate measurement, as well as durable materials for long-lasting use. Additionally, a user-friendly design with clear markings can help make the gapping process easier and more efficient.

Can A Spark Plug Gapper Improve Engine Performance?

Yes, a spark plug gapper can improve engine performance by ensuring the spark plug gap is set correctly, which promotes efficient combustion. Properly gapped spark plugs help optimize fuel ignition, leading to smoother engine operation and better fuel economy.

How Do You Properly Use A Spark Plug Gapper To Set The Correct Gap?

To properly use a spark plug gapper, first select the correct gap measurement for your spark plug from the vehicle’s specifications. Then, gently insert the gapper between the electrodes and adjust by bending the ground electrode until the gap matches the recommended measurement.

Conclusion

Choosing the best spark plug gapper means balancing precision, ease of use, and durability. While some gap tools may offer extreme accuracy, they can be less user-friendly for occasional use, and simpler models might lack longevity.

The ideal spark plug gapper delivers a reliable measurement and adjustment experience without unnecessary complexity, making it suitable for both DIYers and professional mechanics. Concerns about size, material, or compatibility with various spark plugs are valid but mostly addressed by versatile, well-designed options available today. Ultimately, the best spark plug gapper is one that matches your specific needs, offering consistent results and straightforward operation.

Taking these factors into account will help you select a tool that contributes to efficient engine performance without hassle.