Larger Acme adjusting screw and a hardened steel locking ring are two features that make these 2,000lb (907kg) capacity high jacks last for many years of use.
Roller head jack (JH2R) has extra wide bearing for greater strength and tool life. Adjusting screw gives proper working height for up to 24" diameters. Outer surfaces are powder painted or zinc phosphate plated to resist corrosion. 1,000lb (454kg) capacity ball transfer attachment (JTA) with replaceable ball castors bolts to either side of V-head. Height Adjustment on JHV & JH2R = 24-47".