1,200 lbs. capacity,sidewind crank, total 10" adjustment,bolt-on swivel trailer jack,zinc coated with 6" poly caster wheel. Marine boat ... ,1,200 and 1,500lbs.or name it marine jack,swing-way jack,6" orr 8" wheel for choice. Spec. capacity: 1200lbslift ... : 6.85kgpacking: 100pc per crate,(poly bag+seal+crate) Bolt-on swivel bracket capacity: 1000lbslift travel: 10"bracket height:12.70 ...