The BLACK+DECKER 16 piece accessory set is perfect for masonry, metal, wood drilling and screw driving tasks. It contains drill bits for masonry, metal and wood drilling and screw driving bits, so you have everything that you need to get started on any DIY home improvement task. The set comes in a handy storage case that features a transparent cover for quick, easy identification of accessories. It is also designed with removable bit holders so that you can remove the bit bars from the case for ease and convenience. The set includes masonry drilling - 5, 6 and 8mm bits, 7 x 25mm screwdriver bits (PZ, TX, SL), metal drilling - 2, 4 and 6mm bits, wood drilling - 4 and 6mm bits.