This Nut and Bolt Thread Checker is designed with 26 male/female gauges, including 14-inch and 12-metric sizes, to ensure accurate threading in metalworking applications. The gauge is made from high-speed steel (HSS) and has a black and silver color scheme. The thread checker's dimensions are 5 x 4.3 x 1.7 inches, and it weighs 1.04 pounds. This product is ideal for use in inspection gages, metalworking inspection and measurement, CNC, metalworking, and manufacturing. About this itemNut & Bolt thread checker was designed to make your job easier and improve efficiency, being a fast and simple way of verifying the thread of your bolts and nuts. Applicable to mechanical repairs, or common threads in plumbing, air and gas connections, etc.Made of high-quality high-speed steel, this is a rust resistant material that will not bend or break, designed to withstand the test of time.Easy to use: Each individual gauge features a male threaded stud on one end and a female threaded hole on the other. Conveniently assembled onto a wire loop, it's the perfect portable solution.INCH Nut & Bolt Thread Checker Size - Includes: 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 Nut & Bolt Thread Checker Size - Includes: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75. Product Description