Material: the wheels using nylon material, 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: nylon handle, reasonable, 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.