Features: -Material: Metal, plastic -our yarn winder creates yarn balls with the string that can be pull from the center, making your knitting sessions convenient and neat. -our yarn winder is constructed from 3-millimeter-thick steel with rust-resistant powder coating to ensure it will stay in place so you can organize your yarns quickly and safely. -our specific gears are designed to be both durable and flexible. Tough enough to handle high-speed winding, soft enough to ensure the gear noise is at an absolute minimum. Package include: 1* Yarn Ball Winder Note: -When installing the tube, you need to wring hard according to the direction so that it can become strong. Instruction: 1, Postion the yarn guide with the eye upward and insert the other end with rasied hook underneath the washer and screw tight. 2, Attach the winder to a table top with the clamp. 3, Turn the bobbin onto the gear top clockwise until it's tight. 4, How to thread: Put the yarn end through the eye of yarn guide, then go through the eye of the flyer, lock the yarn end to the top bobbin, start turning the handle slowly, gradually increasing spped.