Irwin Unibit 10234SM Step Drill Bit, 3/16 in Dia Min Hole, 7/8 in Dia Max Hole, 12 Steps, HSS, 12 Hole Sizes, 3/8 in Shank Irwin Unibit Step Drill Bit, Imperial, #4 Letter/Wire, 3/16 in Diameter Minimum Hole, 7/8 in Diameter Maximum Hole, 3 in Overall Length, 12 Steps, 1/16 in Step...
