Step up to the 12.4Mm bosch pro soft metal hss countersink drill bit for deburring and countersinking medium-sized pre-drilled holes in soft, non-ferrous metals like aluminium and copper. It's a handy size for installers who regularly work across a range of hole sizes. High-speed steel hss gives the bit strength and resistance to heat. Three 90 cutting edges work through soft metal to deliver clean, burr-free countersink holes with precision. The cylindrical shank is compatible with three-jaw drill chucks for straightforward use with your existing drill. Features and benefits: precision deburring and countersinking in soft metal high-speed steel hss construction for strength and heat resistance three 90-degree cutting edges for clean, burr-free countersink holes cylindrical shank compatible with three-jaw drill chucks specifications: size: 12.4Mm material: high-speed steel hss cutting angle: 90 cutting edges: 3 shank: cylindrical