Rather than by every bit you may need for your projects, save some money and buy the 100-piece accessory kit. This kit comes with the standard bits used in most household projects. 22 DRILL BITS, 3 DRILL STOPS, 1 ALLEN KEY, 3 SPADE BITS, 9 NUT DRIVERS, 61 DRIVER BITS, 1 STUBBY SCREW DRIVE, AND FOLDING CASE WITH BUILLT IN STORAGE COMPARTMENTS