High quality: the wooden handle has an ergonomic design and is easy to hold. Double carbon steel bearing metal wheels, heavy beech wood handles are hard and crack-free, thickened and enlarged convex and concave metal wheels, each of them is finely crafted and durable.Double wheel sealing roller: the screen window spline roller has two different rollers, the convex and the concave roller, which allows you to do the work better and faster.It is convenient to change the gauze. When you use, the wheel is easily aligned with the adhesive tape and rolls slowly, so you can easily press the tape into the slot. Changing the gauze is a pleasure.Wide application: box contents: 1 x screen window flower key roller, 1 x hook tool. Suitable for installing window and door glass sealing strips, window slats for technical screens, for replacing home screen networks, etc.