Activated remotely by twin in/out buttons, the Rewind Radial lets you safely ease and trim highly loaded sails in both directions without ever taking the line out of the self-tailer, a patented feature. Like all electric Radials, the Rewind operates like a normal Harken two-speed electric winch. A simple flip of the red knob on the winch base turns on the rewind feature. A spring-loaded arm of investment-cast stainless steel funnels and keeps line captive as it feeds in and out of the self-tailer while you adjust the sail under fingertip control.