Kobalt 15-Piece Hex Shank Screwdriver Bit Set

4-in-1 Drill and driver: pre-drill, countersink or counter bore, then flip the tool insert to drive screws without re-chucking. Change from drilling to driving functions fast and easy. Patented on-board hex key for bit changes and tool modularity. Unique metal application insert with drill stop and hex head/nut driver. Magnetic bit tip for strong fastener retention. Extremely convenient, versatile and easy-to-use drill/driver accessory. For use in wood, plastic and metal. Works with all drill/drivers and quick-change connectors.