Command hooks feature a revolutionary clean adhesive that's as easy to remove as it is to apply. To use, apply the adhesive strip to the back of the hook and press firmly for 30 seconds. Wait one hour before using. To remove, slide the hook cover-up, grab the tab and slowly stretch it down. Only the adhesive comes off, not the paint or wallpaper. They are great for decorating glass block, plaster, ceramic tile, and wood cabinets. Also ideal for closets, lockers, offices, kitchens, laundry rooms, dorms, campers and more.