NameBolt checker MaterialAlloy Color: red WIDE RANGE OF SIZE CHECKING: Our 44-hole nut bolt thread checker can help you identify 44 different sizes of nuts and bolts with metric thread sizes from M3*0.5 to M24*3.0 and inch thread sizes from 6-32 coarse to 1-12 fine, which can help you identify different sizes of nuts and bolts quickly and easily. STURDY: Our nut and bolt thread checker is made of alloy and the rust-proof thread pin is firmly fixed in the hole of the identifier, making the tool more resistant to damage EASY TO USE: Mount our Nut & Bolt Thread Checker with 3 pre-drilled mounting holes, easily hang it on the wall after use or attach it to the toolbox for easy access when needed CLEAR SCORE: The nut gauge features inch and centimeter scales on the edge that are clear and easy to compare, helping you quickly and easily identify the size of bolts and nuts. MEET YOUR NEEDS: Whether you're a professional machinist or an avid DIY enthusiast, there's no need to go to the hardware store to make comparisons, this bolt and nut checker plate helps you quickly and accurately compare exact sizes Product List Bolt checker*1