【Taps and Dies】 The alloy steel combination tap and die set is used for cutting threads: the tap is used to process internal threads while the die is used for external threads, ideal for threading fasteners and fixing holes for car and machine repair. 【Strong and Durable】 Industrial-grade steel construction ensures durability and high performance. This ratcheting die and tap transmission tool features high and uniform hardness and good wear resistance. 【Combination Tap and Die Set】 The 40-piece professional metric tap and die set contains different sizes of taps and countersinks for a variety of threads and threads as well as a straight tap, a T-handle tap, and an open-end wrench. All the tools you need are included in one kit. 【Widely Used】 With this tapping tool you can easily cut materials such as aluminum, iron, cast iron, alloy steel, carbon steel, abrasive steel, malleable cast iron and other metal materials, which are perfect for most hand threading applications. 【Easy Storage】