Sutton Carbon Hand Tap Set, Metric Coarse. Set includes one each of a Taper, Intermediate & Bottoming Tap. Made from Tungsten Chrome Alloy these taps are ideal for routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical in general purpose applications, non-ferrous metals & plastics.Straight flute taps are only suitable for hand operations, tapping up to 1-1/2 x diameter.