Storage boxes specially adapted for truck beds and chassis and parts therefor; Trailer hitches, couplers and receivers; towing bars, eyes and hooks; mud flap mounting plates for vehicles; splash guards and mounts for vehicles; racks for vehicles for bicycles, ladders and tools; mechanically assisted self-contained dump unit inserts for installation in pickup trucks; electric fitted tarp systems comprised of motorized tarps and controllers therefore specially adapted for covering truck beds; M...