Fulton F2 Trailer Jacks feature extruded aluminum alloy inner and outer tubes and an anodized, corrosion resistant finish. They are equipped with an integrated pull-pin which allows the jack to swivel easily up and down. The wide wheels support up to 1600 pounds of weight and the Dual-track model has 2 wheels that roll independently which makes changing direction smooth. Each model is equipped with an adjustable mount and swivel system and bolts onto marine, recreational and utility trailers.