Tools & Gear Drills Countersinks

3846-10 10.0mm HSS Countersink Triple Flute 90 Deg. Bright Hex Shank Specifically engineered for use in impact drivers these bits are also fully compatible with conventional rotary drills. 1/4" hex shank facilitates fast tool loading in cordless impact drivers and quick change adaptors. For countersinking and deburring in a wide range of materials including ferrous and non-ferrous metals. The three fluted countersink is self centering with wide flutes and is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk head screw or to provide the lead in for a second machining operation such as tapping. Use on medium to hard materials. Resharpenable. Manufactured from premium quality high speed steel for long service life.