Curt Manufacturing 16560 Towing Wiring Allows for forward and rearward movement of 5th wheel hitch for added clearance For use with the CURT A16 5th wheel hitch head #16520 or E16 #16515 Ideal for towing 5th wheel trailers with large overhangs up to 16,000 lbs. Constructed with solid, non-binding rods that lock the hitch into position Designed to be a true rolling unit, not just a slider