Lacis Umbrella Yarn Swift is made of a finely finished birch wood. The purpose of this tool is for supporting skeins of yarns of various sizes for winding and balling off hanks of yarn. It has a table clamp with wooden twist screws to hold it in place and spins freely as you wind your skeins on your yarn ball winder. Yarn winders are available and sold separately. You'll love the gentle whirring sound of the swift as it turns. A must in every knitting supply cabinet! Wooden Umbrella Small- For use with yarn hanks with a 60" circumference.