CURT 28570 Direct Weld On Heavy-Duty Drop Leg Trailer Jack, 8,000 lbs. Support Capacity, 15-1/4 Inches Vertical Travel.Drop leg square jacks are a heavy-duty trailer jack option. They are designed to weld directly onto the frame of your trailer for superior holding strength. Direct weld square jack features a support capacity of 8,000 lbs., a lift capacityof 7,000 lbs. and a travel of 15". With a jack foot plate attached to the bottom, this type of jack also provides addedstability for your trailer on rough terrain. It comes with a top-wind handle and is an excellent choice to meet the high demands of the farming life and construction industry.