Inch & Metric Thread Checker tool saves a considerable amount of time Before starting your project, you can easily thread, especially useful for hard-to-disassemble nut or bolts The Inch and metric thread Gauges Includes 14 inch and 12 metric size, catering to the inspection needs of various nut and bolts The metric size include: M4x0.7、 M5x0.8、 M6x1.0、 M7x1.0、 M8x1.0、 M8x1.25、 M10x1.0、 M10x1.25、 M10x1.5、、、; Inch size include: 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 Nut and Bolts thread Checker is steel, high hardness and wear resistance, not easy to wear and break It help you quickly and accurately identify the of screws, bolts and nut, enhancing work efficiency Our thread Checker is a professional tool equipped with 26 thread gauges, including 14 Inch and 12 metric Size, Manufacturer: LiRRvb