RODAC 5-piece graduated bit set offers the 1/4" shank in the following sizes: 3/16"-1/2", 1/16" scale, 6 grades 1/8"-1/2", 1/32" scale, 13 grades and a 3/8" shank in the following sizes: 1/4"-3/4", 1/16" scale, 9 grades 1/4"-1-3/8", 1/8" scale, 10 grades 3/16"-7/8", 1/16" scale, 12 grades