Quick-Trip Mechanical Track Jack, AL-81 features a "quick trip" feature when under load which allows load to be instantly dropped. Can be used for lifting or pushing applications. Forged and heat treated components for strength and long service life. Accepts any 1-1/2-inch square lining bar. Cast aluminum housing with a lift capacity of 15 tons. Stroke of 13-inches. Minimum cap height of 22-5/8-inches, and minimum toe height of 2-inches. Weight: 50 pounds. Requires skilled operator. Product of Aldon® Company.