Equalizer Single Leg Hydraulic Trailer Jacks and Hydraulic Trailer Jacks The Single Leg Equalizer Hydraulic Jacks are the quickest and easiest method to lift you trailer plus load and unload your trailer from a tow vehicle. These Equalizer single leg hydraulic jacks come in several lifting capacities and several sizes to best fit your horse, cargo, equipment and car trailer needs. Equalizer jacks are made in the USA with high quality materials and cutting edge designs. Equalizer single leg hydraulic jacks can be installed by the customer, dealer, service / repair center, etc. Stop straining lifting your trailer and buy a Equalizer Jack today. Free Shipping and Best Prices in the country.