Ball Winder (Lacis II) Hand operated yarn winder for making perfect pull thread balls up to 4 oz. without requiring any cones or tubes. Comes with integral 1.5" table clamp. Covered gear box prevents jamming. This is a fantastic gadget, and a very useful one at that. It allows you to convert yarn on hanks, spools or cones into flat bottom, self-standing, center-pull balls. It can be used together with the umbrella swift. It is so easy to use, even young children can help you with it.