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.