PORTABLE PRECISION: This portable thread size checker keychain provides precise measurements for both inch and metric screws It is your go-to solution for quickly and accurately verifying thread sizes. Whether you are a professional mechanic, a dedicated DIY enthusiast or someone who works with nuts and bolts regularly, this tool is designed to meet your needs with precision and convenience. Quick Thread Identification: Easily verify and identify thread sizes with clear markings, ensuring accuracy and saving time on all projects Reduce the risk of error. Clear and precise markings every measurement is accurate With this thread size checker, you can say goodbye to guesswork and hello to efficiency. CONSTRUCTION: Made of high-quality - metal, this thread size verification tool is built to last Whether you're working in a damp garage, a dusty construction site or a well-equipped workshop, this tool will stand the test of time and provide reliable service when you need it most Colour:Silver Material:alloy Package Contents: 4 x Keychain Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.