12v Electric Trailer Winch , The 912 and 712 Trailer Winches are well established with solid, reliable reputations. They feature smooth power-in/free-wheel out action. You can use a pulley or block at the bow eye to double your pulling power You can get more strength out of your trailer winch, but it slows retrieval speed 50%., Remote power-in/freewheel-out operation, 60 amp standard wiring harness, Pulley block for double line applications, , Model 712, 23′ suggested max boat length, Max. boat weight of 7,500 lbs, 2400 lb vertical lift capacity (single line) or double pull/line capacity 4300 lbs. (Not to be considered or used as a hoist).