Big Red 3 Ton Hydraulic Floor Jack with Quick Lift Piston Pump for Car.Hydraulic garage jack is constructed with heavy duty steel, providing long term quality and durability for every day and industrial use. Minimum lifting height of 5.1" and a maximum height of 18.3".Equipped with (2) large steel casters and (2) 360-degree swivel casters for smooth maneuverability.In terms of safety, this service jack even comes with a built-in safety overload system which prevents use beyond load capacity. If you meet any problems, please feel free to contact our customer service team and we will do our best to help you fix your issues.