Tongue Interlock, MT GD2, No Special Features, 2 N.C. Safety, 2 N.O Aux, 2 N.C. Safety Contacts, Snap Acting Contacts, Standard Actuator, 2 N.O. Auxillary Contacts, M20 Conduit, 1/2in. NPT adptr, Tongue Interlock Switch, Die Cast Alloy (red)