The is a versatile tool that mounts effortlessly to a wall or tool box, making it an indispensable tool for professionals and DIY enthusiasts alike. Its reserved mounting holes it is ready for use at any time. 34 Nut and Bolt Thread Sizes: This thread detector offers 34 nut and bolt thread sizes, including 19 standard and 15 metric sizes. Its thread sizes range from No. 6 to 3/4 inch and 4mm to 16mm, allowing you to easily identify and match a variety of hardware components. Excellent identification capabilities: Bolt size and thread gauges have excellent identification capabilities, including universal standard and metric thread sizes. Each size includes nut and bolt checkers on the same gauge for quick and accurate identification and streamlines your workflow. [HIGH QUALITY CONSTRUCTION]Made of carbon steel and 12.9 grade hardness tool steel threads for durability. Its high-temperature nickel-based treated ensures stability and durability. The laser-printed graduations feature a bright white-red design for easy-to-read markings. UNIVERSAL STANDARD AND METRIC USE: No matter what work environment you are in, this product work as it works with both standard and metric thread sizes. This means you can tackle a variety of tasks from home repairs to professional projects with ease.<br><br>Colour:red Material:carbon steel<br><br>Package Contents: 1 x nut and bolt <br><br>Only 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.