ThisCraftsman combination carbon steel sethelps you work with damaged nuts, bolts and threads. When a replacement bolt is hard to find, you can use this tap and die set to remove imperfections from threads. Youll be ready to take on any job with both inch and metric sizes. Combines inch and metric sizes in 1 convenient kit Set includes: 7 drive tools with accessories, 17 inch plug taps, 17 inch hex dies, 17 metric plug taps, 17 metric hex dies sturdy storage case with handle Hardened, precision-ground and polished carbon steel surfaces make chip removal easy Hex-shaped dies permit use of sockets and wrenches as well as die stocks Rust-resistant satin finish for smooth cuts with less friction