Milwaukee 49-22-8001 3-Piece Pathfinder Bit Set Set includes 1/2", 3/4" and 1" bits as well as latching carrying case. Drills irregular or curved holes, cuts channels, mortises, grooves. Bits fit standard 3/8" chuck...and have 3 flats to eliminate slipping. Use on wood, composites, chipboard, plasterboard and hard plastics Drills 2 times faster than spade bits