Each drum of the Harken radial winch is made from high-quality chrome or aluminium, while the self-tailing jaws and skirts are made from white composite. The handle surfaces have diagonal ribs to optimise grip and reduce line wear. The angle of the ribs also prevents unwanted upward sheet slippage. The self-tailing jaws and skirts are made from high-strength composite, save weight and together with the composite roller bearings reduce friction under load. The bearings do not require any lubrication. The gears and shafts are made from stainless steel in order to improve their strength and durability. Available in various models.