Min & Max Height Capacity: Total 13200 lbs (6 ton), each 2200 lbs (1 ton). We suggest to adjust the screw pole to your ideal height before loading. 【Installation】Simply keep the base plate stationary and swivel the top plate to required height, and then tighten the positioning nut with a wrench in order to secure the top plate, even one person can install and use in seconds.
eBay