Flexible wet and dry sanding sponge These sanding blocks are made of density sponges, providing resilience and strong plasticity, making them tearresistant. They can be used for both wet and dry sanding, and can even be used directly in water, thanks to their water storage function that reduces flushing and improves work efficiency. Four grit options Available in 60, 80, 120, and 240 grits for coarse, medium, fine, and superfine sanding. Each block has a grit mark on its surface for easy identification and selection. Washable and reusable These sanding sponges are washable and reusable, allowing for multiple uses. Their portable and handy size makes them suitable for polishing both flat and irregular surfaces. Versatile applications Use these sanding blocks on wood, paint, metal, plastic, or drywall. They are for kitchen appliance cleaning, woodworking furniture polishing, metal derusting polishing, amber polishing, and more. Use scenarios Wood furniture and cabinetry: prepare and refine wood surfaces with the appropriate grit progression, starting from coarse to fine, to achieve a smooth finish ready for staining or sealing. Metal and hardware care: use wet or dry sanding to remove rust and polish metal surfaces or components, improving readiness for coating or assembly. Kitchen appliances and plastic parts: clean and polish surfaces to restore appearance and prepare for finishing or coating, including irregular or curved shapes.