·36 Nut and Bolt Sizer - Our bolt thread identifier instantly recognizes 34 different sizes, including 16 metric thread sizes (From M3 x 0.5 to M16 x 2.0) and 20 imperial threads (From #6 - 32 Coarse to 3/4 - 16 Fine) Make sure your bolt sizing tool is compatible with all standard hardware!

·Masterful Craftsmanship Thread Checker - Our nut and bolt thread checkers are carefully made using CNC machining. Ensure accurate internal and external thread sizes. Quickly identify the classification of bolts and nuts. Note: Not suitable for irregular nut.

·Multi-Functional Design - 1: The bolt sizer has 6 pre-set mounting holes for easy mounting on a wall or tool box; 2: The nut bolt gauge is designed with scales on both sides, 15 cm and 6 inches (Laser Etching); 3: Four non-slip feet (Removable).

·Upgraded Design - Our bolt identifier board features 19 different size drill gauges. It has 6 metric (4mm - 14mm) and 13 imperial (1/16“ - 1/2”) gauges helping you measure drill bits quickly and easily.