Description
Product Overview
The CTA Tools A311 25‑blade extra long feeler gauge is engineered for professionals who demand accuracy and durability in tight‑fit measurements. Each of the 25 stainless‑steel blades is precisely ground to a thickness of 0.04 inches, allowing you to detect minute gaps that other gauges might miss. The gauge measures a total length of 14.75 inches, providing an extended reach without sacrificing the compact form factor needed for confined spaces. Its multi‑color coding helps quickly identify blade sizes, while the robust stainless‑steel construction resists corrosion, ensuring a long service life even in harsh workshop environments.
Designed with a compact style, the gauge fits comfortably in a toolbox or on a workbench, and its lightweight design—just 11.8 ounces—means it can be carried on‑site without adding unnecessary bulk. The product dimensions of 14.75″ L x 3.75″ W make it easy to store alongside other precision tools, and the included 25‑blade set covers a wide range of measurement needs, from automotive valve clearances to industrial machinery tolerances. The gauge’s user‑friendly layout, combined with its professional‑grade build, makes it a reliable choice for mechanics, engineers, and maintenance technicians alike.
![[Product front view showing all components]](https://www.focalshop.store/wp-content/uploads/2026/07/5904cfb2e0244b17b456a78032c9418c.jpg)
Usage
When working on automotive engines, the A311 feeler gauge excels at checking valve clearances, spark plug gaps, and timing belt tension. Its extra‑long blades allow you to reach deep into engine bays without removing other components, saving valuable time during diagnostics. In industrial settings, the gauge is equally effective for measuring shaft tolerances, bearing clearances, and alignment gaps on heavy equipment. The stainless‑steel blades maintain their shape even after repeated use, providing consistent readings across multiple applications.
Because the gauge is lightweight yet sturdy, it can be used in field service scenarios where portability is essential. Whether you are inspecting a production line, performing routine maintenance on a forklift, or troubleshooting a high‑performance racing engine, the A311 offers the precision needed to make informed adjustments. Its clear blade markings reduce the chance of reading errors, and the ergonomic design ensures comfortable handling during prolonged measurement tasks.
Why Choose Us
CTA Tools has a reputation for delivering professional‑grade tools that stand up to the toughest conditions. The A311 feeler gauge reflects this commitment through its high‑quality stainless‑steel blades, which are resistant to rust and wear. Each gauge undergoes rigorous quality control testing to verify blade thickness, straightness, and durability before it reaches the customer. This attention to detail translates into a tool that provides reliable, repeatable measurements day after day.
Beyond the material quality, CTA Tools offers comprehensive customer support, including a responsive warranty service and technical assistance for any measurement challenges you may encounter. Our after‑sales team is ready to help you get the most out of your gauge, whether you need guidance on proper usage or advice on selecting the right blade for a specific application. Choosing CTA Tools means investing in a product backed by a brand that values precision, durability, and customer satisfaction.
Key Features
- Stainless‑steel blades with 0.04‑inch thickness deliver high‑precision gap measurement.
- Extra‑long 25‑blade design reaches deep into engines and machinery without removal.
- Compact, lightweight construction (11.8 oz) ensures easy portability and storage.
- Corrosion‑resistant build provides long‑term durability in harsh environments.
- Dedicated CTA Tools customer support and warranty for peace of mind.
FAQ
What is the measurement range of the A311 feeler gauge?
The gauge includes 25 blades ranging from 0.04 inches up to 0.50 inches, covering most automotive and industrial gap measurement needs.
Can the gauge be used for both metric and imperial measurements?
Yes, the blade markings are dual‑labeled in both metric (millimeters) and imperial (inches) units, allowing seamless conversion between systems.
Is the gauge suitable for high‑temperature environments?
The stainless‑steel construction tolerates elevated temperatures typical of engine bays and industrial settings, though it is recommended to allow the gauge to cool before storing after prolonged exposure.
How does CTA Tools ensure the accuracy of each blade?
Each blade is calibrated using precision machining equipment and undergoes a final inspection to confirm thickness and straightness within tight tolerances before packaging.
What warranty does CTA Tools provide for this gauge?
The A311 comes with a one‑year limited warranty covering manufacturing defects, and our support team is available to assist with any issues that arise during normal use.




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