General description Easily tap new materials or repair slightly damaged threads, such as rusted screws, nuts, and bolts, with the Hi-Spec tap and die set. This set is ideal for home, garage, or workshop use, allowing you to clean and restore old, broken, or damaged threads. Taps cut internal threads, while dies cut external threads. For fast and efficient work, it is recommended to use these cutting tools with cutting oils. Technical specifications Material: GCr15 alloy steel Includes: 9 x metric taps (M3 to M12), 1 x NPT (1/8-27) plug, 9 x metric dies (M3 to M12), and 1 x NPT (1/8-27) die Type: 18-piece metric tap and die set Compatibility and accessories Suitable for tapping and threading carbon alloy steel, cast iron, aluminum, brass, and bronze Includes 2 x tap and die wrench handles with alloy steel bodies and adjustable fittings Storage case included for organization