Our 4 corner boatlift will lift and dock virtually any boat or PWC from 800lbs through 15,000lbs in a u-shaped free floating slip. By using the latest technology, the four corner boatlift protects your boat's hull while it strengthens your dock. The benefits of the four corner boatlift include easy operation, little or no maintenance, and the option of reversing your boat into the slip. This is why Floatair Boatlifts is the boatlift dock builders recommend and engineers buy.