Skein Winder Yarn Ball Winder Folding Type Craft Knitting Tools Height: 44cm, Diameter: Approximately 65cm, Possible thickness of mounting part: ~37cm Used for winding skeins of yarn and unwinding yarn. This tool is for winding long yarn purchased commercially. It is very convenient when used with a ball winder, as it creates round, beautiful balls. The iron parts are chrome-plated (transparent) to prevent rust.