In-Line Yarn Ball Winder. This hand operated yarn winder is perfect for making pull thread balls up to 4 ounces without requiring any cones or tubes. This unique winder uses an in line bobbin with a moving yarn guide and a removable table clamp; giving the winder total control and a very smooth winding motion. Winder measures 5-1/2x8x3-3/4in and clamps onto surfaces up to 1-1/2in thick. Imported.