Item Type: Metric Tap and Die Set Material: Hard Alloy Purpose: Hand Tool Kit Function: Cutting, Adjustment, for Metal Processing System: Metric Die Specifications: M3,4,5,6,7,8,9,10,12 Package List 9 x Threading Die 9 x Screw Tap 1 x Die Wrench 1 x Tap Wrench 1 x Plastic Box 1All cutting teeth have been accurately CNC processed and accurately heat treated to hardness 60 HRC for best threading performance. 2Very suitable to create new threads or repair damaged threads on plastic, aluminium. A good tool for home, backyard, garage mechanic. 3This tap and die set is made from hard alloy material, which ensures high hardness and long service life. 4Suitable for thread processing of carbon steel, cast iron, aluminum, brass, copper, stainless steel and other metals. 5Ideal for rethreading fasteners and fastener holes for auto and machinery repair. Providing more convenience.