5000 pounds of lifting capacity per jack. Heavy duty all-steel construction. Each jack include a large 5" by 8" rectangular steel base plate and frame mounting plate that are supported by their own individual channels. All scissor arms are engaged by means of tooth gear design to ensure straight line vertical extension and retraction. The crank turns easily due to a thrust ball bearing located at the junction of the drive screw and primary trunion. The crank when installed in the receiver can be easily rotated ecen when tilted. The entire jack is zinc plated and the crank handle is chromed to ensure long life and trouble free performance. Will fit most RV's regardless of the ground to frame clearance because it can extend from 4-3/4" to 24-3/16".

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