Knit Picks Wooden Umbrella Yarn Swift (Onyx) Holds your hanks or skeins of yarn in place as you wind them into balls, and folds down for compact and convenient storage. A smooth Black satin finish brings class and sophistication to natural Birch wood Simple clamp holds swift in place easily on any table or surface up to 1 1/2'' thick, and umbrella opens to snugly fit most standard-sized yarn hanks. Metal hardware adds durability and polish, with plastic stopper to prevent scratches and damage when clamping swift to a table. For best results, use in together with the Knit Picks Yarn Ball Winder to make tidy and convenient center pull cakes.