The Monument TRV Tail Driver is a quick assembly tool designed for the fast removal and installation of radiator valve tails. It fits most makes and sizes and can be used with either a cordless drill chuck or a ratchet with a 10mm hex socket. This socket is a significant advancement for speedy installation of 1/2in radiator valve tails, eliminating the need for part turns with a spanner and reducing the risk of marking radiators. Simply install the socket into a 10mm hex socket or a drill for quicker, more efficient installation, saving time and energy.