Tekton 7560 45 Pc SAE Tap and Die Set (1/4 - 1")Tekton 45 Pc SAE Tap and Die set features both course and fine thread sizes, tapered plugs, and is made of tungsten alloy high speed steel. Hardened tungsten alloy high speed steel construction Cut new material or chase lightly damaged threads 3 , 4 , 5 , and 6 flute plug taps and dies for hand threading applications Tapered coarse and fine taps start easily and prevent overthreading Storage case keeps everything neat and organized Contents: 1 pc. 1 4