Harken Performa Alum Self-Tailing Winch20 Self Tailing Performa Winch AL 1 Speed All Performa winches feature sandblasted drums optimized for halyard and sheeting applications using small diameter, high tech line. Self tailing winches have narrow composite jaws to ensure superior holding power on small diameter line. The self tailing mechanism on the winch means that one crew member can quickly and easily trim or raise sails.