The K Tool International 22 ton service jack includes the following specs: Minimum Height: 9" (228mm); Maximum Height: 18" (457mm); Hydraulic Lifting: 4-3/4" (122mm); Extension Screw: 4-1/4" (107mm); Saddle diameter: 1-3/4"; Wheel Diameter: 8"; Handle length: 48-2/5". This service jack has the capacity to lift up to 22 tons or 44,000 lbs. Jack has built in by-pass device to protect hydraulic system from over pumping damage. Truck jack offers built-in muffler to promote quiet operation, High speed turbo motor for efficient effortless operation. Heavy duty truck jack (service jack) has a welded cylinder and reservoir for added strength and durability. The truck jack also has chrome plated rams to resist rust and wear.