Attach your swift to the edge of a table using he clamp on screw. Make sure the attachment is firm so the swift doesn't fall off during quick spinning. You can knit straight from the swift or wind the yard into a center-pull ball using Loops & Threads ball winder. Wood . 24” x 4” x 4”. 1 umbrella yarn swift . Spins Smoothly. Super Smooth Finish by Fine Sanding. Solid beach wood. The yarn swift holds your hanks or skeins of yarn in place as you wind them into balls.