Screw Bolt Nut Thread Measure Gauge Size Checker - Great tool for quickly sorting bolts and nuts in a simple way, save necessary time to find the proper size bolt and matching nut for your project, it's also great for measuring hardware before you take a trip to the without having to bring one along to the store, a must have for your toolbox, also nice gift for DIY ers or Dad. Design - This bolt and nut identifier gauge has holes for measuring bolts, and the pegs on the sides for nuts, both imperial and metric, and the emboss thread profile on the back side for identifying thread pitches, easy to read markings, and it has built in holes for hanging , bright color stand out on your workshop or garage, and help you to faster. Accurate and Solid Built - This bolt thread gauge is made of heavy duty plastic, and the plastic is reinforced with good thickness (about 5/32inch) that 't break easily, long lasting performance, solid construction and clear text for easy reading, smooth , without burr, 't hurt your hands. Compact and - The nut and bolt gauge is 3.3Inch wide x 8.7Inch long, and weights only 2 oz, takes up little space, fits ly in most portable tool box, it can also be easily mounted on a bench or wall to not easily to be lost, must have for your garage and workshop, nice bolt measurement tool to keep in the toolbox. What You Get - Nut and Bolt Gauge Metric and Standard Sizer Tool. Inch Size - including #4, #5, #6, #8, #10, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4; Metric Size - including M3, , M5, M6, M7, M8, M10, M12, M14, M16, , M20, M22; Nut Size - #6, #8, #10, 1/2, 1/4, 3/8, 5/8, 5/16, 7/16, 9/16 Colour:Black Material:Plastic Package Contents: 2 x Bolt Gauge 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.