THIS IS A MUST HAVE IF YOU’RE INSTALLING SUICIDE DOORS ON ANY VEHICLE. THESE ASSEMBLIES INSTALL NEAR THE FRONT DOOR JAMB, AND AT THE TOUCH OF A SWITCH, A LOCKING PIN EXTENDS OUT SO THAT THE DOOR CANNOT ACCIDENTALLY BE OPENED. THESE ARE ALSO MANUAL. THERE IS A KNOB ON THE OTHER SIDE OF THE PLATE THAT IS NOT SHOWN. WIRE, RELAYS AND SWITCH ARE NOT INCLUDED. SOLD IN PAIRS