Features: Made of durable stainless steel, each pillars is precisely processed to ensure that every bolt and thread meets the Go & No Go Class 2BANSI standard. Our nut and bolt thread checker instantly identifies 28 different sizes, including metricthread sizes from M4x0.7 to M14x2.0, and imperialthread sizes from#6 32 fine to 1/2 20 coarse. A onestops solution for verifying all standard hardware. The bolt size and thread gauge features a durable lasers etched inch and centimeter scale, allowing users to quickly and accurately identify various thread sizes. Constructed from lightweight 6061 aluminum, the gauge is designed to be durable and easy to read with lasers etched markings. Its sturdy design allows you to effortlessly carry it to different workplaces. Suitable for various applications, the screw measurement gauge can be easily mounted on walls or toolboxes. With predrilled installation holes, it is an indispensable tool for professionals and DIY enthusiasts. Specifications: Material: Aluminium Alloy Size:Approx.50x10x2.5cm/19.68x3.93x0.98inch Color:Black Package Includes: 1x Bolt and Nut Identifier Gauge note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.