Sturdy Tungsten Alloy Steel: The tap and die set is made of hardened tungsten alloy steel. These heat-treated taps and dies with accessories are manufactured to be very hard, with high strength and improved durability to be used for several years without replacement. Easy Threading and Tapping: With this metric tap and die set, easily use the taps to cut a thread inside a hole or form female parts of mating tools like nuts. The sturdy dies cut or form a male part like bolts. Our metric tap and die set is designed to help perfectly cut new or repair damaged internal and external threads. Widely Applicable Taps and Dies: These high-quality taps and dies can thread any metal with efficient results. Strong metals that can be tapped or threaded include aluminum, brass, carbon alloy steel, cast iron, and bronze. This hardened thread set is relatively easy to use, offering less fatigue, and has high resistance to corrosion and wear. Package Contents: This thread and tap set includes 9 metric