Tongue Interlock, Trojan 6, No Special Features, 2 N.C. Safety, 2 N.O Aux, 2 N.C. Safety Contacts, Break Before Make, Standard Actuator, 2 N.O. Auxillary Contacts, M20 Conduit, 1/2in. NPT adptr, Tongue Interlock Switch, Plastic – 440K-T11438