Description: Removable Design: Nut and bolt thread checkers are designed with a detachable wire loop, you can open or close it, which is convenient for you to use anywhere, and it is also convenient for you to use single or partialDouble Sided Printing SizeThis nut and bolt thread size checkers are made of steel material and equipped with double sided sizes, so that you can see the size more conveniently and quickly during use, and ensure that the color and marking can be used for a long timeDesign: Each size of the accurate size thread checkers is equipped with a nut and bolt checker on the same gauge, equipped with 23 inch and 21 metric US male and female gauges, a total of 44, with thread size printed on each gauge, and a single gauge can be freely rotated on the cable for quick verification of the threadInch Size: Thread gauge identifiers include 23 Inch size part numbers, 6-32, 6-40, 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, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1-8, 1/12Metric Size: Nut and bolt thread checkers include 21 metric size part numbers, 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, M14x2.2, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0 Specification: Material: Steel Size Chart: Packing size 15 cmx15 cmx5 cm/5.91 inchx5.91 inchx1.97 inch Package Includes: 44x Nut and Bolt Thread Checkers Note: Please allow slightly errors 1-2cm differences due to manual measurement.