Cobalt Step Drill Bit 89HRC Hardness Spiral Flutes 14in Hex Shank 4 To 20mm Drill Bit for Drilling

Feature: 1. 4 Spiral Flutes Design: The four spiral flutes ensure faster and smoother drilling. It feels like cutting through butter with a hot knife. 2. 9 Step Drill Bit: Support drilling diameters, 4mm0.16in, 6mm0.24in, 8mm0.3in, 10mm0.4in, 12mm0.47in, 14mm0.55in, 16mm0.6in, 18mm0.7in, 20mm0.8in. 3. Durable and Long Lasting: Made from M35 cobalt, the step drill bit is highly durable and can withstand prolonged use without wearing out easily. 4. 89HRC Surface Hardness: The step drill bit with 89HRC surface hardness can drill through harder materials and achieve higher drilling speeds. 5. Wide Application: Step drill bit is perfect for stainless steel, metal sheets, wood, plastic, aluminum sheets, copper, and other metal plates. Specification: Item Type: Step Drill Bit Material: M35 + cobalt Drilling Diameter: 4 6 8 10 12 14 16 18 20mm Shank Diameter: 14 inch. Package List: 1 x Drill Bit1 x Storage Box4 Spiral Flutes Design: The four spiral flutes ensure faster and smoother drilling. It feels like cutting through butter with a hot knife. 9 Step Drill Bit: Support drilling diameters, 4mm0.16in, 6mm0.24in, 8mm0.3in, 10mm0.4in, 12mm0.47in, 14mm0.55in, 16mm0.6in, 18mm0.7in, 20mm0.8in. Durable and Long Lasting: Made from M35 cobalt, the step drill bit is highly durable and can withstand prolonged use without wearing out easily. 89HRC Surface Hardness: The step drill bit with 89HRC surface hardness can drill through harder materials and achieve higher drilling speeds. Wide Application: Step drill bit is perfect for stainless steel, metal sheets, wood, plastic, aluminum sheets, copper, and other metal plates.