Feature 1Accurate Measurement: Precise nut and bolt thread checker set provides accurate measurements to ensure the size of your parts is correct and accurate. 2Size: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, 632, 832, 1024, 1032, 1/420, 1/428, 5/1618, 5/1624, 3/816, 3/824, 7/1614, 7/1620, 1/213, 1/220. 3High Speed Steel: Inch metric thread gauge is made of high speed steel material, ensuring durability and long term stability of the measuring tool. 4Inch and Metric Specifications: Features all SAE male and female specifications, as well as metric specifications, meeting almost all your needs. 5Metal Material: Thread identifier gauge is constructed with metal material, ensuring the durability and longevity of the thread checker. Item Type: Thread Checker Material: Metal Size: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, 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 Fitment: Quickly Checking Nuts and Bolts Inch or Metric and Verifying The Size Package List 1 x Set of Thread Checker (26pcs Thread Checkers)