Description: 1.Quick size find, more practical and durable, 2.CNC machined from 6061 aluminum with a protective anodized finish. 3.Laseretched markings wont fade or get scratched off. 4.This product distinguishes between similar inch and metric threads . 5. METRIC THREAD SIZES -m4 x 0.7 -m5 x 0.8 -m6 x 1.0 -m7 x 1.0 -m8 x 1.0 -m8 x 1.25 -m10 x 1.0 -m10 x 1.25 -m10 x 1.5 -m12 x 1.25 -m12 x 1.5 -m12 x 1.75 -m14 x 1.5 -m14 x 2.0-16mm x 2.0. 6. IMPERIAL THREAD SIZES- -#6 ¨C 32 Fine -#8 ¨C 32 Fine -#10 ¨C 24 Coarse -#10 ¨C 32 Fine -1/4 ¨C 20 Coarse -1/4 ¨C 28 Fine -5/16 ¨C 18 Coarse -5/16 ¨C 24 Fine -3/8 ¨C 16 Coarse -3/8 ¨C 24 Fine -7/16 ¨C 14 Coarse -7/16 ¨C 20 Fine -1/2 - 13 Coarse -1/2 ¨C 20 Fine-5/8-11 Coarse 5/8-18 Fine 3/4-10 Coarse 3/4-10 Fine fine ruler with inches and centimeters on both sides. 7. The bolt size and thread gauge has common standard and metric thread sizes, Identifying Hardware from #6 to 3/4" & 4mm to 16mm. Each size has a nut and bolt checker on the same gauge. 8. The nut and bolt thread checker has 8 different size holes at 4mm, 6mm, 8mm, 10mm,12mm, 14mm, 1/4inch,1/2inch, which help you quickly and accurately determine the screws size, recommends the drill bit or tap size needed for the screw. 9.Multi-Purpose:Our nut and bolt thread checker has multiple application, which is effortless to install on the wall or put in the toolbox. It has reserved mounting holes and suitable for professionals and DIY enthusiasts. Detailed description: Product Name: Nut and Bolt Thread Checker Material: Aluminum alloy Size: 52101.5cm Color: Black Parts List: 1*Nut and Bolt Thread Checker