Metric Tap & Hex Die Set, 24-Pc.24 piece, metric tap & hex die set, dies are ideal for routine maintenance, repair work & for rethreading where high accuracy & tolerance thread is not critical, taps have straight flutes which are ground to provide rapid chip removal for efficient threading, designed for hand threading work in a variety of materials taps produce a class 2b thread, includes metric 3 mm x 0. 50, 4 mm x 0. 70, 5 mm x 0. 80, 6 mm x 1. 00, 7 mm x 1. 00, 8 mm x 1. 25, 9 mm