CURT 28321 Weld-On Pipe-Mount Swivel Trailer Jack, 3,000 lbs. Support Capacity, 10 Inches Vertical Travel. Pipe mount swivel jack features a support capacity of 3,000 lbs., a lift capacity of 2,000 lbs. and a travel of 10". With a jack foot plate welded on the bottom, this type of jack also provides added stability for your trailer on rough terrain. It comes with a side-wind handle and includes a weldable pipe with a 9/16" hole for secure mounting.