StikkiDots stick firmly to all kinds of surfaces without damage or messy adhesive residue. Removable and reusable, the adhesive never dries out. These adhesive dots can be used on wallboard, cinder block, brick, plaster, paneling, pegboard, concrete, metal, glass, plastic, wallpaper, tile, and almost anything else. They're great for applications in home, office, classroom, workshop, kitchen, laundry, hobby room, studio, dorm, locker, and almost everywhere else. Details:3/8" diameter6 packs, 50 per pack Waterproof, safe and nontoxic