I used this Kali Wallpaper Toolkit to apply the Azu Mod Triangles Peel and Stick Wallpaper roll. I primarily used the paddle and brush to help apply the wallpaper smoothly and to minimize the air bubbles during application of the wallpaper. I found that when using the paddle, it smudged a bit of the wallpaper colors so started applying with a lighter pressure to prevent smudges. All in all, nice tools and will keep in my toolbox for future wallpaper applications.