Curt Manufacturing 16621 A16 5th Wheel Hitch with Roller & Rails for Short Bed Trucks (16,000 lbs. GTW) Tested for safety in accordance with SAE J2638 to 16,000 lbs. GTW and 4,000 lbs. vertical load limit (capacity limited to lowest-rated towing component) Fully articulating torsion head for controlled coupling and stable towing, and cast yoke with poly-torsion inserts to suppress shock loads and reduce noise (patent# 8,827,298) 5th wheel roller provides 12" of travel in the truck bed and rolls on wheels and solid, non-binding rods to be a true rolling unit Lockable handle self-resets to the ready-to-couple position after uncoupling, and fast, one-pin head removal makes moving the hitch easy Includes A16 5th wheel hitch head #16520, R16 roller #16560, base rails #16200, hardware and polyethylene lube plate