Stiks' firmly to all kinds of surfaces without damage or messy adhesive residue. removable and reusable, adhesive never dries out. waterproof, safe, and non-toxic. Use on wallboard, cinder block, brick, plaster, paneling, pegboard, concrete, metal, glass, plastic, wallpaper, tile, and almost anything else. Use in home, office, classroom, workshop, kitchen, laundry, hobby room, studio, dorm, locker, and almost everywhere else. StikkiHOOKS are available in packages of 4 hooks in colors that match many popular home, school, and workplace surfaces.