Hydraulic bottle jack designed for residential and commercial use; Serrated, heat treated saddle provides generous lifting area and secure grip. Features a lifting range of 9-7/16" to 17-5/8" with a 20ton (40,000lb) capacity; Adjustable screw top extension adds versatility. Engineered using a drop forged alloyed steel construction for quality and durability; Inner/outer welded structure delivers leak-free performance. Glide-action pressure pump is designed to lift with minimal effort; Integrated built-in oil-bypass and overload valve that protects the hydraulic system from extending beyond limits.