All in one. Includes insert bits, bit holder, sockets, socket adapter, countersink, black oxide drill bits, rotary masonry drill bits, brad point bits
The Extra Hard Screwdriver Bit is a good choice for universal use - It has a 1/4-inch external hex shank and is intended for universal screw-driving with screwdrivers and drill drivers.
Hexagon Adapter connects the hole saw to the power tool - It is suitable for use with all corded and cordless drill drivers. Fits threaded standard adapter.