Step Drill Bit Set, 3.2 - 22.2 mm, 3 Pieces Step Drill Bits, 6.35 mm Hex Shank, TiAlN Coating Cobalt HSS High Speed Steel, for Metal, Stainless Steel, Aluminum, Wood, Plastic, Fiberglass

Step Drill Bit Set, 3.2 - 22.2 mm, 3 Pieces Step Drill Bits, 6.35 mm Hex Shank, TiAlN Coating Cobalt HSS High Speed Steel, for Metal, Stainless Steel, Aluminum, Wood, Plastic, Fiberglass