Hi-Lift All - Cast Jack Hi-Lift All - Cast Jack The Hi-Lift Jack Company offers the only all-cast jack manufactured in the world today. Our casting jack is manufactured from high yield and tensile strength iron castings, the same durable metal that we have used for over 100 years. All-Cast Construction. 7000lb (3175.14kg) Tested Capacity. Available in 42", 48", & 60" Heights. (107, 122, & 152cm) Lifts, Winches, Clamps, & More. Most Durable Design.