Works like Magic.Just wet and squeeze the eraser sponge and you are ready to make all things clean.These durafoam sponges are more than your average sponge, so your bulk pack of 20 can last you months.The unique 3-layer wave design and ultra-dense melamine foam can easily remove scratches and dirt every time.These sponges do not contain bleach or other irritating chemicals, making them to use on a variety of surfaces.According to ergonomic design,the of 3.92.40.9 inch fit the palm of hand ly, making the cleaning work more comfortable.The melamine sponge foam can be cut into your desire to fit different surfaces, to reach any corners.Clean all kinds of surface dirt like sneakers, sink, ceramic tableware, taps, tile, doors, shoes, oven, sofa, toys, bathtub, light switches, various kinds of leather etc.It also is indispensable tools for marine maintenance kits, and are the tools to wipe scratches between deep cleanings, keeping the boat shape in its condition.