Features 1. Portable precision thread size checker: This thread size verification tool is designed for fast and accurate measurement, without the need for guessing. With its portable design, you can easily carry it to any work site or project. 2. Convenient keychain accessory: Equipped with a keychain ring, this thread size checker can be easily connected to your key or belt, ensuring that you are always within reach when needed. You no longer have to worry about losing or misplacing tools. 3. Multi functional unit reading design: This thread checker has metric and imperial units, providing versatility and convenience for accurate measurement in any project. Clear size markings can easily identify thread dimensions, thereby reducing the risk of errors. 4. Durable structure and long-lasting performance: This measuring tool is made of high-quality materials such as aluminum alloy and hardened stainless steel threads, which can withstand frequent use and harsh environments. It ensures the maximum thread strength and accuracy of standard and metric nuts and screws. 5. Quick manual measuring tool: Say goodbye to the days of finding the right size through random sleeve testing. This thread checker features a sliding knob and easy to read markings, allowing for quick and accurate measurement of bolt dimensions. It is a must-have tool for professionals and DIY enthusiasts, allowing you to easily check dimensions in seconds and take your craftsmanship to new heights. Specification Material: Iron Color: Silver Size: 6 x 3 x 1 cm Weight: 60 g Package Include: 1x Thread Size Verification Tool