Bulldog AC500 0300 - Adjustable Coupler ChannelDesigned for utility, utility, horse livestock, cargo and construction trailer applications, BULLDOG Couplers are the strongest in the industry. The patented cast head "Wedge Latch" coupler design is offered in heavy duty, A frame, and convenient adjustable height models. Adjustable couplers assure level operation for trailers when pulled by a variety of vehicles. For use with Cequent couplers and lunette rings rated up to 24,000 lbs. Quick and easy