Structural parts and components for industrial, commercial, and emergency land vehicles, namely, roll up doors systems, roll up doors, drip rails for roll up doors, handles for roll up doors, sill plates and drip pans for roll up doors, roll up door compartment lighting, door ajar sensors and switches for roll up doors, pull cords and straps for roll up doors, drawer systems, drawer handle kits, drawer slides, and tool boards for vehicle compartments, D-ring handles, paddle handles, folding T and folding bale handles, locks, postal lock sets, key cylinders, slam latches, rotary latches, compression latches, latch controllers, strikers, adjustable striker kits, striker cages, striker plates, striker bolts, rods, rod guides, and pulls for vehicle compartment doors, grab rail kits, grab rails, grab rail stanchions, lighting for grab rails, vehicle compartment lighting kits, vehicle compartment vents, and gaskets, trim covers, and exterior covers for vehicle compartment vents, sun visors, sun visor retaining clips, window regulator kits, window regulators, handles for window regulators, window blinds, ashtrays, coat hooks, door checks, emergency hammers and emergency hammer mounts, folding grab handles, folding steps, tie downs, inside release handle knobs, multi-point hardware kits, seat nets, remote latching mechanisms, tow hooks, end bolts, and hinges