1. Flexible wet and dry sanding foam spongeThis sanding block is made of highdensity foam, excellent resistance and strong plasticity, making it not easy to tear. It can be used wet or dry for various sanding tasks. 2. 7 different grit optionsChoose from 60, 80, 100, 120, 180, 240, and 320 grits, for various stages of coarse, medium, fine, and superfine sanding. The sanding block is labeled with grit for easy identification. 3. Washable and reusableThese sanding sponges are washable and reusable, allowing for longer use. They can also be used in water due to their water retention function, reducing rinsing and improving work efficiency. 4. and versatileThe sanding sponges are portable and handy, suitable for polishing flat and irregular surfaces. They can be used on wood, paint, metal, plastic, or drywall. Suitable for cleaning kitchen utensils, woodworking, furniture polishing, metal rust removal polishing, amber polishing, and more.