Bolt and nut identification gauge is selected from aluminum and hardened screws. Ensures strength and accuracy of screws in both standard and metric nuts Say goodbye to random test fittings to find the right value Save time and effort Suitable for professionals and enthusiasts as it can easily identify screw size while reducing the risk of errors This thread size checker with key chain easily attaches to your belt or belt and is ready to grab when you need it With a sliding knob and clear size markings, this tool allows you to quickly and accurately measure the size of your bolt. Quick and accurate measurements without the guesswork Intuitive and durable construction for professional tasks for quick problem solving and perfect results, Manufacturer: Rxgiasup