Suit for efficient clean cutting of internal and external threads. Perfect to create new threads or repair damaged threads on most metals like carbon steel, cast iron, aluminum, brass, copper and stainless steel.
Each tap and die in this set is constructed of long-lasting alloy steel for maximum durability. Hardened, precision-ground and polished carbon steel surfaces make chip removal easy. All cutting teeth are precisely machined to Rockwell hardness 60 HRC for best threading performance.Rust-resistant satin finish for smooth cuts with less friction.