These nail-free hooks are waterproof and oil proof, modern and stylish, These wall hooks perfect match with most home decoration. It can work on hard smooth surface such as ceramic tile, refrigerator door, wardrobe, marble, wood tile, ceramic ,mirror, stainless steel, acrylic, plastic, laminate and more. Just peel off the cover starting from the bulge, then put the hooks on smooth surface. Great for hanging coats, towels, robes, mops, brooms, jackets, hats, bags, umbrella, scarves, keys, purses, plants, kitchen utensils, loofah, brush, soup ladles, spatula.