Magnetic socket rail C Impaktor 1 socket set, 1/2" drive9 piece set; on rail for temporary attachment on walls, shelves, workshop trolleys. Smooth rotary mechanism for safe storage and easy access of the tool. 9 Impaktor sockets with 1 2" drive. With hexagon profile with socket and well. For use with electric or pneumatic wrenches with 12. 5 mm = 1 2" drive. Take it easy tool finder: With colour coding by size to help you find the required tool quickly and easily.