This comprehensive drill and screw bit set is ideal for working with metal, wood, and concrete. It includes 45 HSS-R drill bits, 8 brad point drill bits, 5 flat bits, 9 masonry drill bits, 4 hole saws and adapter, 130 screw bits, bit holder, 20 nutsetters, 2 socket adapters, 17 hex key wrenches, and 14 other essential accessories, all neatly organized in a durable plastic case. With a total of 256 pieces, this set has everything you need for any drilling or screwing task.