CURT 28250 A-Frame Trailer Jack, 5,000 lbs. Support Capacity, 14-1/8 Inches Vertical Travel. Trailer jacks a-frame are made with quality to promote the life and function of your trailer. Designed specifically for A-frame trailers. They canbe bolted or welded directly onto the trailer frame. A-frame jacks are made to retract completely to ensure enough clearance for safe travel. Features a support capacity of 5,000 lbs., a lift capacity of 3,000 lbs., a travel of 14" and a top-wind handle.