ANDERSEN 50 ST FS Self-Tailing Manual 2-Speed Winch - Full Stainless [RA2050010000]50 ST FS Self Tailing Manual 2 Speed Winch Full Stainless Power Rib ANDERSEN Winches feature the Power Rib. Unlike other winches with abrasive drum surfaces, ANDERSEN winch drums have vertical ribs running up the surface. This combined with the smooth polished stainless steel gives a maximum grip and minimum wear on ropes, reducing the replacements costs of sheets and halyards. Whats more, the Power Rib principle simply makes sailing more pleasurable.