Power through all your DIY jobs around the home and garden with the Black and Decker 31 Piece Drill Bit Set. Contains 17 drill bits and 12 screwdriver bits, plus a magnetic bit holder, which makes screwdriving easier as the screw will stay on the drill bit rather than needing to be held in place. Also included is a countersink bit, which allows you to create the perfect finish in any screwdriving task. Masonry drill bits are sized 5, 6, 7 and 8mm. There are 8x HSS TiN metal drill bits ranging from 1.5 - 6mm. The brad point wood bits are sized 3, 4, 5, 6 and 8mm. There are 12 assorted screwdriver bits which are 25mm and 50mm in length, which cover all standard fittings. Always read instructions before use.