Features: 126 PIECES SET: Includes a 26 pieces nut and bolt thread checker set with 12 metric specifications and 14 inch specifications to meet different specifications. Provides wide range of application. 2RED AND BLUE APPEARANCE: The nut bolt thread checker set adopts red and blue design appearance, which is fashionable and generous, easy to identify and distinguish different sizes. 3EASY TO USE: You can take out all the nut bolt thread gauges at will for quick thread identification. This makes it easy to check thread sizes on certain equipment or in hard to touch places. 4PRACTICAL TOOL: The metric inch nut bolt thread gauge is finely manufactured to increase efficiency and accuracy in your work. Ideal for repair enthusiasts to help ensure thread fit and tightening. 5WITH STORAGE CASE: These nut and bolt thread checkers are stored in a case with specification markings to help you quickly organize them to avoid misplacing, cluttering and losing them. Specification: Item Type: Nut Bolt Thread CheckerMaterial: Aluminum12pcs Metric Sizes: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.7514pcs 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 Package List: 26 xNutBoltThreadChecker1 x Storage Case