A 21-piece tool module with a 1/2-inch square drive for working with metric screws and nuts. Contains 18 hex sockets in sizes 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 27, 30 and 32 mm. Includes a ratchet with a reversing lever, a 250 mm extension bar and a universal joint for access to connections at an angle. The tools are stored in a shaped plastic module for a workshop trolley drawer.