Brownell Manual Boat Lift 8,000 lb Capacity. Vertical lifting height range of 21"-43". Horizontal reach of 17". Perfect for lifting your boat off the trailer for seasonal storage and maintenance. Positions under the hull step and uses an ACME threaded rod with handle to lift the hull off the trailer and safely lower it onto stands. System includes 2 K4 keel stands and KS1 supports (SB4 stands needed for bow for longer term storage- not included in kit). System also includes wheels.