Flexible wet and dry sanding: These sanding sponge blocks are designed for both wet and dry sanding, enabling use in a variety of applications. The density sponges provide resilience and plasticity, helping prevent tearing during use. Multiple grit options: The set includes 7 grit options: 60, 80, 100, 120, 180, 240, and 320. Each sponge block is clearly marked with its grit for quick identification. Washable and reusable: The sanding sponges are washable and reusable for longlasting performance. They can be used wet or dry, and their water storage function allows direct use in water, reducing flushing and improving work efficiency. Portable and versatile: The handheld design makes the sponges portable and easy to use. They are suitable for sanding flat and irregular surfaces, making them useful for a range of tasks. Use them on wood, paint, metal, plastic, or drywall. Use scenarios: Refinishing wooden furniture or cabinetry, using progressively finer grits to achieve a smooth surface before staining or painting. Preparing painted surfaces for repainting by feathering edges and removing light burrs without gouging. Smoothing drywall joints and plaster for a readytopaint finish.