HSS Straight Groove Step Drill Bit 3-12mm 4-12mm 4-20mm Hex Wood Metal Hole Cutter

Made of high quality HSS steel, hard and wear-resistant. Suitable for a variety of materials, can easily punch holes in wood, aluminum, plastic boards, insulating boards and other materials. Face shank design to prevent slippage when chucking. Two groove designs drive faster, smoother and cleaner cutting Each step is clearly marked with the depth diameter of the step. Material: High speed steel Color: Black Size: 3-12mm/4-12mm/4-20mm Application: It is suitable for drilling and hole reaming processing of wood, aluminum, plastic board, insulating board and other materials with a thickness of less than about 5mm. Set of 3 Pieces