Description: 【Quick Measurement】: Nut bolt thread gauge is an accurate and easy to use nut and bolt thread identifier that can help you identify or sort out messy bolts and nuts in seconds. 【INCH and Metric Thread Checker】: The thread checker can quickly identify different sizes of bolts and nuts, covering the most common thread sizes. 【Compact Size】: This compact thread checker makes it easy to carry, allowing you to bring it conveniently to your worksite or project. 【Application】: The bolt and nut identification is very suitable for auto repairers, plumbers, mechanical engineers, and DIY tool enthusiasts. 【Sturdy Construction】: The bolt and nut identifier is made from aluminum alloy material making it well crafted, sturdy, and wear resistant. The numbers are clear reading, easy to measure, and read accurately. Specification: Material: Aluminum Alloy Color: Black Silver 【23 Various INCH SIZES】: 1-12, 1-8, 3/4-16, 3/4-10, 5/8-18, 5/8-11, 9/16-18, 9/16-12, 1/2-20, 1/2-13, 7/16-20, 7/16-14, 3/8-24, 3/8-16, 5/16-24, 5/16- 18, 1/4-28, 1/4-20, 10-32, 10-24, 8-32, 6-40, 6-32. 【21 Various METRIC SIZES】: M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, M14x1.5, M14x2.0, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0. Size Chart: 30cmx20cmx6cm/11.81inchx7.87inchx2.36inch Package Includes: 1 Box Bolts and Nuts Thread Checkers(Include 44Pcs) Note: Please allow slightly errors due to manual measurement and different monitors.