Used for same applications for the lower capacity bottle jacks but also heavy duty trucks, farm equipment, building construction, mining, mobile home setup, oil field and power sources for manufacturer"s products. This bottle jack features a ductile iron base for added strength, Electrostatic paint for rust prevention and heat treated extension screw increases low height to get full use of ram travel. Hydraulic bypass system prevents over extension or ram. Two-piece slip fit handle for controlling the release valve and pumping the jack. This model includes a grab handle for carrying a heavier jack.