Hand Operated Yarn Ball Winder Manual Wool/string Winder with Set of Locking Stitch Markers (Medium) Yarn ball winder can produce medium to large sized balls of yarn Can wind up to 700-800 yards worsted-weight yarn into one yarn "cake" Comes with 20 locking stitch markers that fit up to size US10 knitting needles Smooth and quick winding. Works great with yarn swift (not included) Adjustable table clamp to secure winder to table edge