Fast Lifting Dual Pump: Quick Jack has 5 times the lift speed which is compared with floor jack with single pump Meet your lifting needs: Min. Height: 3.94"/100 mm. Max. Height: 20"/508 mm; The wide lifting range makes it suitable for all types of vehicles Safe and reliable: Built-in overload safety valve to avoid safety hazards caused by pressure overload and provide long-term and reliable safety protection Labor-Saving: With the help of the long handle, it can be lifted to the highest with less forc; Its slow descent system ensures that the vehicle descends slowly after completing maintenance, avoiding vehicle damage caused by a rapid fall Heavy duty load capacity is up to 4 Ton (8000 lbs) and can be applied to most vehicles on the market for personal and commercial use