Blacksmith HSS Drill Bit Stepped 12.7mm Shank Bits Drills Steel Metal 12-35 mm
Material：HSS. Can Drill Stainless Steel, Iron Copper Aluminium Alloy, Wood Plastic and Other Materials. Pipe and Fittings >. Spiral Large Groove Design, Good Chip Removal Performance, Fast Drilling Speed, Significantly Improve Work Efficiency.