Features: 1Aluminum Material: Made from premium aluminum metal, this nut and bolt thread checker set is reliable and built to last, ensuring long term use without damage or deformation. 2Versatile Thread Checking Set: Includes 44 piece nut and bolt thread checker, manufactured precisely to meet various specifications, enhancing efficiency and accuracy in your work. 3Quick and Accurate Measurement: Simply screw the nuts or bolts into the identifier gauge, and within seconds, check the size with accuracy, saving time and quickly identifying the correct size. 4Stylish Red and Blue Design: The fashionable red and blue color allows for easy identification and differentiation of different sizes, helping you quickly classify mixed nuts and bolts to prevent misplacement, confusion, and loss. 5Ideal for Mechanical Work and Home Projects: Perfect for everyday mechanical tasks or projects at home, this thread checker box is suitable for home use or as a gift idea for family or friends who enjoy crafting. Specification: Item Type: Nut and Bolt Thread CheckerMaterial: AluminumWeight: Approx. 790.00g/27.87ozColor: Red and BlueSize: 44 different sizesRed Metric: 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, M14x2.0, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0Blue Inch: 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, 1-12 Package List: 44 x Nut and Bolt Thread Checker1 x Storage Box