Precise thread inspection device designed for accurately checking screw, nut, and bolt threads, helping you quickly distinguish metric and imperial standards in daily maintenance or professional work.Made of high-quality aluminum alloy, this screw measuring gauge is lightweight, durable, and corrosion-resistant, offering long service life and easy portability.Clearly marked scales and thread profiles allow fast identification of common nut and bolt sizes, improving work efficiency and accuracy.Designed to cover multiple standard sizes in both metric and imperial systems, this thread gauge is ideal for measuring bolts, screws, and nuts in various applications such as automotive repair, machinery, furniture, and home DIY projects.This specially designed nut and bolt thread inspection device is perfect for accurately checking screw, nut, and bolt threads. It helps you quickly distinguish between metric and imperial standards in daily maintenance or professional work. Made of high-quality aluminum alloy, this screw measuring gauge is lightweight, durable, and corrosion-resistant, ensuring a long service life. Its clearly marked scales and thread profiles allow for fast identification of common nut and bolt sizes, making it easy to match or replace fasteners without trial-and-error, thus improving work efficiency and accuracy.Color: BlackMaterial: Aluminum AlloyPackage Contents:1*nut checker