Tri-Point Speed Auger Bits will drill fast and clean holes in all types of wood. The three spurs and cutting edges create perfectly round holes with less chance of binding in the workpiece. Three flutes offer efficient waste removal making them much faster than traditional bits. A self-feeding screw tip enables accurate centring and pulls the bit through the wood. Precision machined from high-quality carbon steel with ground and honed cutting edges. The quick-release 1/4in hex shank is impact rated for use in impact drivers as well as all other corded and cordless drills.FAITPASET3PC, 3 Piece: 16, 20 and 25mm Features: Three spurs and ground and honed cutting edges Creates perfectly round holes with less chance of binding Creates perfectly round holes with less chance of binding A self-feeding screw tip enables accurate centring Impact rated, quick-release 1/4in hex shank Specifications: Dimensions: H:22.7 x W:3.7 x D:6.1 cm Colour: Silver Guarantee:5 years Material: Metal Model Number