[Premium Quality] Constructed from durable aluminum alloy 6061, this thread checker features an anodized surface to resist rust and corrosion. It is designed to provide precise and efficient thread inspections, enhancing work efficiency. [Comprehensive Identification] Easily identify 34 different sizes with the 42-hole nut and bolt thread checker. It includes 15 metric sizes from M4 x 0.7 to M16 x 2.0 and 19 standard sizes from 6-32 coarse to 3/4-16 fine, along with 8 drill gauges. The 0.58 cm thick aluminum alloy plate ensures durability. [User-Friendly Design] Features laser-etched markings for clear visibility. Its compact square design includes a 15 cm and 6-inch ruler on each side for quick measurements and efficient organization of various parts. [Versatile Placement Options] Equipped with two hanging holes and four removable padded feet, this thread gauge can be placed on a workbench or hung on a wall for convenient access. [Integrated Drill Gauges] Includes 8 drill bit gauge holes ranging from 4 mm to 14 mm and 1/4 inch to 1/2 inch, enabling selection of the correct drill bit size. Suitable for professionals and DIY enthusiasts. Color: red Material: metal Package Contents: 1 x Thread Checker