DEWALT BLACK and GOLD Hex HSS-G Drill Bits made with a 1/4in hex shank, designed to withstand radial torque with percussion hammers and compatible with most power drills. The black and gold coating helps to prevent rust and wear. A 135 degree split point tip helps to reduce walking. Its strong, conical braided design provides extreme durability and resistance to breakage. These DEWALT BLACK and GOLD Hex HSS-G Drill Bits have the following specifications: Tip Diameter: 8.0mm.Length: 117mm.Working Length: 79mm.Pack Qty.: 1.