Tongue Interlock, Trojan 6, No Special Features, 3 N.C. Safety, 1 N.O Aux, Break Before Make, 3 N.C. Safety Contacts, 1 N.O. Auxillary Contact, No Actuator, M20 Conduit, 1/2in. NPT adptr, Tongue Interlock Switch, Plastic – 440K-T11408