Barb Step Drill Bit,Step Drill Bit High Hole Cutter Tool Drill Bit Eco-Friendly Materials

SpecificationItem Type: Step Drill BitMaterial: High speed steelUses: Drilling wood, stainless steel, plastic plates, copper plates, aluminum platesApplicable Equipment: Electric drill, bench drill, battery drill, etc.Shank Type: General hex handleSize(Approx. ) Step number Blade length per step(Approx. ) Shank diameter(Approx. ) Total length of cutter head(Approx. )4 ~ 12mm / 0.2 ~ 0.5in 5 7mm / 0.3in 6.35mm / 0.3in 43mm / 1.7in4 ~ 20mm / 0.2 ~ 0.8in 9 4.5mm / 0.2in 6.35mm / 0.3in 55mm / 2.2in4 ~ 22mm / 0.2 ~ 0.9in 10 4mm / 0.2in 6.35mm / 0.3in 55mm / 2.2in4 ~ 32mm / 0.2 ~ 1.3in 15 4mm / 0.2in 6.35mm / 0.3in 78mm / 3.1inPackage List1 x Step Drill BitNote