The black and decker a7183 new family accessory 30 piece set consists of drill bits suitable for masonry wood and metal along with screwdriver bits of different lengths and a countersink bit the bits are supplied in a secure and robust case the flip out bar allows easier access to the bits the bits are manufactured from titanium to provide excellent drilling and greater durability the black and decker a7183 drill bit set contains 4 x masonry drill bits 5 6 7 8mm 8 x metal drill bits ranging from