**Product Description: Portable Thread Size Checker Keychain - Accurate Nut & Bolt Verification Tool** - **Versatile Unit Reading Design** Equipped with both metric and imperial units, this thread checker offers versatility and convenience for precise measurements on any project. The clear size markings make it easy to identify thread sizes, minimizing the risk of errors. - **Quick Thread Identification** Effortlessly verify and identify thread sizes with clear, legible markings, ensuring accuracy and saving time on all your projects. Say goodbye to guesswork and hello to efficiency with this reliable thread size checker. - **Convenient Keychain Loop** With an attached keychain loop, you can easily secure this bolt size finder to your keys or belt, ensuring it's always within reach when needed. No more rummaging through your toolbox—access it anytime, anywhere. - **Versatile Usage** Perfect for measuring threads quickly and accurately on a wide range of nuts, bolts, and screws, this thread size checker keychain provides flexibility and convenience in any work environment. - **Efficient and Accurate** The versatile design of this bolt size finder allows for one-handed operation, making it both practical and efficient. Simply slide the knob to tighten and measure your workpieces with ease, ensuring precise measurements every time. Upgrade your toolkit with the Portable Thread Size Checker Keychain and experience unmatched accuracy and convenience on the go!