MATERIAL : The wheels using nylon material, on the basis of wear and avoid the yarn cut the yarn off. CHANGE THE GAUZE BY YOUSELF :With it, you will to install the gauze, immediately being a pleasure. HUMANAL DESIGN : Nylon handle, reasonable design, good feeling EASY INSTALLING : Convenienc for you to replace the yarnshaft gauze，ｃan securely fix screens EASY TO USE: When you use it, the wheel is aligned with the tape slightly, slowly rolling, you can easily press the tape into the card slot.