Pieces from 3/32in to 1/2in, by 1/64in increments plus 17/32, 3/4, 7/8, 5/8 and 1in punches Made from heat treated and tempered tool steel Diameters are .0025in undersized to facilitate use Punches are 4-7/8in long Comes in an easy to store and use roll Easily mark holes for drilling and fabrication. 31 Pcs