Everything you need to install peel and stick wallpaper is here in this kit. Use the smoother to remove air bubbles from under the wallpaper. Use the knife to trim the removable wallpaper to your desired needs. Helps you easily install your peel and stick wallpaper; Quickly eliminates air bubbles; Easily cut around corners and outlets; A great tool for larger decals and window décor; Includes one smoother and one utility knife; Perfect for both renters and homeowners.