3/5/6pcs HSS Step Drill Bit Set Cone Hole Cutter

Specification Material HSS 4241Surface Baking yellowQuantity 3 5 6pcsSize 3 16 1 23 16 1 4 5 16 3 8 7 16 1 2 inch 6 35mm 1 4 shank1 8 1 21 8 5 32 7 32 1 4 9 32 5 16 11 32 3 8 13 32 7 16 15 32 1 2 inch 6 35mm 1 4 shank1 4 3 41 4 5 16 3 8 7 16 1 2 9 16 5 8 11 16 3 4 inch 9 53mm 3 8 shank3 16 7 83 16 1 4 5 16 3 8 7 16 1 2 9 16 5 8 11 16 3 4 13 16 7 8 inch 9 53mm 3 8 shank1 4 1 3 81 4 3 8 1 2 5 8 3 4 7 8 1 1 1 8 1 1 4 1 3 8 inch 12 7mm 1 2 shank Features Unique ladder structure round shank Straight grooves Two flute design gives you faster and smoother cutting For cooler running and can effectively extend the service life of the drill bit Suitable for carbon steel plate sheet iron steel plate insulation boards wood Cannot be used for stainless steel Suitable for the workpiece 25 or less Package Included 3 x Step Drill BitsOr 5 x Step Drill Bits 1x Storage CaseOr 6 x Step Drill Bits 1x Storage Case More Details