High Speed Steel Step Drill Bit - Hex Handle for Wood Drilling Sizes 4mm to 12mm

High Speed Steel Step Drill Bit - Hex Handle for Wood Drilling Sizes 4mm to 12mm Item 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 handle Size(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 / 1.7in 4 ~ 20mm / 0.2 ~ 0.8in 9 4.5mm / 0.2in 6.35mm / 0.3in 55mm / 2.2in 4 ~ 22mm / 0.2 ~ 0.9in 10 4mm / 0.2in 6.35mm / 0.3in 55mm / 2.2in 4 ~ 32mm / 0.2 ~ 1.3in 15 4mm / 0.2in 6.35mm / 0.3in 78mm / 3.1in .wang-edit-text{ font-family: Arial !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }