??????????????????????????????? It’s the ideal jack for use on hydraulic cranes, engine hoists, and a wide variety of applications for mechanics, truckers, farmers and off-road enthusiasts. ???????????????????????????????????? This manual hydraulic jack is made from low-carbon steel. Heavy duty and high durability metal construction with up to 12-ton weight capacity. Constructed of high-grade steel and built to exacting standards for quality and durability. ?????????????????????????????? Minimum height:640mm;Maximum height:1130mm;Adjustable height:500mm;Maximum lifting weight:12T; Weight:10lbs. ???????????????????????????????? High quality large diameter hydraulic steel cylinder unit results in lower oil pressure needed to raise the load, helping to reduce wear and extend service life. ???????????????????????????????? Mounts directly onto shop cranes and features a slow release function. Hydraulics are powered with a high quality oil, which offers better corrosion resistance and high/low temperature flexibility.