Features: 1.UNIQUE DESIGN: The nut and bolt thread checker is specifically designed for inspecting fixed bolts or threaded holes in enclosed areas. Multiple size gauges that can accommodate different bolt and thread hole sizes. 2.DUAL UNIT: With both metric and inch measurements, this thread checker offers 14 different size gauges in both metric and inch units, allowing you to use it with different measurement standards. 3.CONVENIENT STORAGE: Bolt thread identifier features 2 hanging holes at the top, making it easy to hang on the wall for storage when not in use, bring you a reliable use experience. 4.VERSATILE USAGE: Whether in automotive repairs, mechanical equipment maintenance, or other fields, this thread checker is suitable for a wide range of applications, catering to your specific needs. 5.HIGH PERFORMANCE: Nut and bolt gauge is made of metal materials to provide long lasting durability and reliability. It is a practical tool that helps ensure the accuracy and integrity of threaded connections. Specification: Item Type: Nut and Bolt Thread Checker Material: Metal Metric Sizes: 4MMx0.7, 5MMx0.8, 6MMx1.0, 7MMx1.0, 8MMx1.0, 8MMx1.25, 10MMx1.0, 10MMx1.25, 10MMx1.5, 12MMx1.25, 12MMx1.5, 12MMx1.75, 14MMx1.5, 14MMx2.0 Inch Sizes: 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 Application: Automotive repair, suitable for the inspection of fixed bolts or threaded hole dimensions in enclosed areas