An essential item for fixing screen doors. An essential tool for efficient and clean reupholstery To reupholstery, use the protrusions on the back of the corners, and the straight part of the middle use a roller to add rubber. Please refer to the various videos on how to recover and the description on the product packaging. If the rubber is less than 0.18 inches (4.5 mm) thick or less as a pet defense or wire mesh, please use the Twin Roller NW.