Wooden Umbrella Style Yarn Swift with Adjustable Table Clamp. Medium Size for Skeins up to 6-foot Circumference Adjustable: Fits skeins up to 6 feet in circumference. Sturdy: Clamps to a table and spins freely. Gentle: No metal edges to snag your yarn. Convenient: Collapses completely for easy storage. Versitile: Holds your yarn so you can wind by hand, or with a mechanical ball winder