【Wide Application Range】Ultra low profile with a minimum lift height of 3-1/3 inch, while a maximum height of 15 inch.Widely applied in cars,not recommended for SUVs and trucks 【Quality Design】Built-in safety valve provides overload protection. Rust Resistant 【Safety Guarantee】Safety bypass system prevents over-loading and ensures safe operation. 【Long Term Durability】Heavy duty steel construction provides long term durability with an industrial luster. 【Easy Operation】 Large Steel casters and swivel casters for easy maneuverability