For lifting, pushing, spreading, bending, pressing or straightening requirements; Not affected by temperature extremes; All models work in upright, angle, or horizontal position; Electrically welded base and cylinders to assure strength and eliminate leaks; Equipped with labor saving air pump; Carrying handle included; Pump handle included; Comes packaged in heavy duty blow molded case; Available in 12 or 20-ton capacities; Complies with ANSI/ASME B30.1 and PALD-1 standards