A fifty-piece module with 3/8 inch drive combines sockets and screwdriver bits for service and assembly work. It includes twelve-point sockets in sizes 8 to 22 mm, deep six-point sockets and bits for slotted, hex, Phillips (PH), Pozidriv (PZ) and star screws. Also included are a ratchet with a reversing lever, a universal joint, and an extension of 125 mm in length. A moulded insert holds the individual pieces in their designated places and makes selection easier during work.