LACIS-Skein Winder Converter. This accessory will add the feature of a yarn winder to your wood swift. Easily attached and removed without tools, it can be used with any swift that has a minimum gap of 1/4 inch space between Top Rotator B and the bottom of Top Knob A. This package contains one Skein Winder Converter with instructions. Swifts sold separately. Imported.