Replaceable drill bits can be installed in place of the current drill bit on a compatible drill bit countersink to extend the tool's life and avoid the cost of replacing the entire tool.Drill bit countersinks can drill and countersink a hole in one step for maximum productivity. Drill bit countersinks produce a chamfered hole with a tapered opening that allows screws to install flush with the surface of the workpiece for a finished look. This helps prevent the workpiece material from swelling when a screw is installed in the hole and tightened down in woodworking and metalworking applications. They can also be used to debur holes for a smooth finish. Specifications: Item: Replacement Drill BitShank Type: StraightShank Type - Machining: StraightMeasurement System: Fractional InchDrill Bit Size: 1/8\"Overall Length: 3\"Material - Machining: High Speed SteelFinish - Machining: Bright (Uncoated)Drill Size: 1/8\"For Screw Size: 1/8\"Number of Flutes: 2"