Nut and Bolt is crafted from aluminum alloy, and all pillars are made of durable material, and it has a hard anodized surface with rust-resistant threaded pins firmly set in the holes of the identification gauge, making this tool more durableOur Nut and Bolt Thread Detector can help you identify 28 distinct sizes of nuts and bolts, featuring metric thread sizes spanning from *0.7 to M14*2.0 and Imperial thread sizes ranging from 6-32 Coarse to 1/2-20 Fine, which can help you identify different sizes of nuts and bolts quickly and easilyOur Nut and Bolt is designed with 3 pre-drilled mounting holes on the top, making it easy to hang it when you're done using it or attach it to your toolbox for easy access when you need itThe Bult and nut gauge features laser-etched inch and centimeter scales on the edges, which are clear and easy to compare, and will assist you in quickly and easily identifying the size of your bolts and nutsWhether you are a professional mechanic or an enthusiastic , you don't need to go to the for comparison, this bolt and nut checker plate can help you quickly and accurately compare the exact size; and it 't get tangled up like the previous coil-type identifiers, which affects the use.Material: Aluminum alloycolour: redPackage Contents:1 x bolt and nut identifier gaugeOnly 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.