Heavy duty tungsten steel alloy: Gunpla's tap and die set is made of hardened tungsten steel alloy. These heat treated taps and dies with accessories are made to be very hard, with high strength and increased durability to be used for many years without replacement Easy threading and tapping: with this set of taps and dies , easily use taps to cut a thread inside a hole or form female portions of mating tools like nuts. Heavy-duty dies cut or form a male part like bolts. Our metric tap and die set is designed to help perfectly cut damaged internal and external threads or Widely Applicable Taps and Dies: These high quality taps and dies can thread through any metal with effective results. Solid 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 dies metrics: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M7 x 1.0, M8 x 1.25, M10 x 1.5, M12 x 1.75mm and wire rings metrics. M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.25, M10x1.5, M12x1.75mm. In this tapping kit, a die holder and a tap wrench have been added to complete the set and help make your tasks more convenient Convenient storage and accessories: our set of 20 taps and dies in tungsten steel comes in a sturdy storage case perfectly designed with its interior part molded to fit every part and keep safe.