Harken 50 Self-Tailing Radial Aluminum Winch 2 Speed. The self-tailing mechanism on the winch means that one crew member can quickly and easily trim or raise sails. Specifications for Harken 50 Self-Tailing Radial Aluminum Winch - 2 Speed: Manufacturer: Harken Color: Black Fabric/Material: Aluminum Height: 8.31 in Weight: 13.2 lb Package Contents: Harken 50 Self-Tailing Radial Aluminum Winch - 2 Speed Harken 50.2STA: 50 Self-Tailing Radial Aluminum Winch 2 Speed