Points: 1.Fine Quality Materials - Thread Tester is made of high-quality stainless steel material. Galvanized for imperial gauges and black oxidized for metric gauges. Resistant to rust and corrosion for longer service life. 2.A Complete Set - Thread Detector includes 26 male/female gauges, 14 inch and 12 metric. Each dimension has a nut and bolt checker on the same spec. A single gauge spins freely on the wire rope for quick thread verification. 3.Easily Hanging - Bolt Thread Detector has a detachable wire loop design. Hang it next to your toolbox in the workshop or garage. Easy to use and store. 4.Practical Tools - Bolt Thread Tester No more bending over for a nut/bolt. It can improve the efficiency of your maintenance. Allows you to determine the size and thread of the nuts and bolts before heading to the to match them. 5.Widely Used - Nut and Bolt Thread Tester for mechanical repairs, or common threads in plumbing, air connections, etc. Save your precious time. Very durable and functional. Nut and Bolt Thread Tester for mechanical repairs, or common threads in plumbing, air connections. Save your precious time. Very durable and functional. Specification: Total length: about 101.6CM/40in Inches (14): 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16 , 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20 Metric (12): M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x .75 Color: Silver & Black Material: steel Package Contents: 1 set x Thread tester Only the above package content, other 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.