The Brophy K125 Channel Coupler has a quick-locking handle with an underjaw design. The trigger mechanism quickly clamps or releases the ball for fast and easy hook-up. The K125 model is made to fit a 2.5" trailer bar connector on one end and a 1-7/8" ball head on the other. It has a 2,000 lb. max towing capacity and is zinc plated.