IRWIN Metric Tap and Hex Die Set, 53 Pieces

Designed to ensure that bolts fit tightly and anchor securely. 4-flute design ensures fast, easy chip clearance. High carbon steel hexagon dies are ideal for cutting right-hand external threads. Hex head shape is designed for use in die stock and adjustable wrenches. Plug taps have 3 to 5 chamfered threads and are for general purpose applications.