The Duck® Pet-Resistant Screen Replacement Kit saves you time and money when fixing damaged window or door screens around the home. Conveniently bundled, each kit includes a heavy-duty, pet-resistant fiberglass screen, spline and spline tool to help make the replacement process quick and easy. Plus, the replacement screen attaches right to the existing window or door frame! To install — cut the screen to size, insert the spline into the frame using the spline tool and secure the screen to the frame. It's that simple.