Tuff Grade TGDB-10235 Step Drill Bit, 1/4 in Dia Min Hole, 1-3/8 in Dia Max Hole, 10 Steps, M2 HSS, 1/2 in Shank Tuff Grade Step Drill Bit, Imperial, #5 Letter/Wire, 1/4 in Diameter Minimum Hole, 1-3/8 in Diameter Maximum Hole, 10 Steps, 1/8 in Step Depth, 1/2 in Shank...
