Features 1、12 Volt 40 amp 5-prong relays 2、Mechanical life of 10,000+ cycles 3、Heavy-duty impact molded relay socket with 5 WIRES 4、High 40A coil capacity- able to handle those high current applications with ease 5、Hundreds of uses include- starter kills, domelight supervision, trunk release, polarity change,power door lock/actuator control, change a low current output to high current,add ignition/accessory outputs, control motors/other electronics, It is Also suit Specification Description: Brand new heavy duty SPDT relays 12 Volt 40 amp 5-prong relays Mechanical life of 10,000+ cycles Heavy-duty impact molded relay socket with 5 WIRES Interlocking relay sockets High 40A coil capacity- able to handle those high current applications with ease Hundreds of uses include- starter kills, domelight supervision, trunk release, polarity change,power door lock/actuator control, change a low current output to high current,add ignition/accessory outputs, control motors/other electronics, It is Also suitable for automobile used for control, alarms, horn, headlight and more.... Package : 5 x 40A Relay (5Pin) 5 x Relay Socket Wire Package List