【EXCELLENT IDENTIFYING】 The bolt size and thread gauge has common standard and metric thread sizes,can identify 28 distinct sizes of nuts and bolts,encompassing Metric thread sizes from M4 x 0.7 to M14 x 2.0, and Imperial threads from #6 - 32 Coarse to 1/2 - 20 Fine.Each size has a nut and bolt checker on the same gauge 【STURDY AND DURABLE】 Nut and Bolt Thread Checker is crafted from 6061 aluminum alloy, and all pillars are made of durable SUS304 material,and have the anodized surface makes it stable and durable，We also include a pair of work gloves to suit your needs 【THE SCALE LINES ARE CLEAR AND EASY TO READ】Our Bolt Size and Thread Gauge features durable laser-etched Inch and Centimeter scales on the edge of will assist you in quickly and easily identifying the size of your bolts and nuts 【LENGTH MEASUREMENT】This screw size and thread gauge is equip with 6-1/6inch and 15cm centimeter rulers on the edge, it helps to quickly Identify the length of bolt, screw, nut and washer 【Pre-drilled Mounting Holes】With 3 pre-drilled mounting holes, it can be easily hung on the wall or fixed in the tool box,it's an indispensable tool for pros and DIY buffs alike