The Sealey towing socket tester allows quick testing of 12V 13 pin Euro type sockets fitted to the rear of a vehicle, & boasts VOSA certification making it usuable in MOT testing stations on vehicle classes 4, 5 & 7. It also features a self-test facility to ensure the serviceability of the tool, & is supplied with a 4.9m cable & 13 to 7 pin adaptor for testing older wiring systems.