Transform yarn hanks and skeins into compact center pull cakes that sit nicely while you knit and crochet Easily winds up to 100g or 3.5 ounces of yarn, from lace and fingering weights to worsted and bulky weights Attaches to any table edge or surface up to 1-1/2" thick Removable spindle and folding yarn guide arm make for compact storage while still allowing quick and easy assembly Use with Yarn Swift for best results Transform hanks or skeins into compact center-pull balls that sit nicely while you knit. A clamp secures the ball winder to the table while you wind skeins up to 100 grams or 3.5 ounces. Best when used in tandem with a Yarn Swift. The guide arm needs to be moved and positioned opposite the winding handle for correct operation.