3M SandBlaster dust channeling sanding sponges are built for the demands of your job This unique sponge channels dust away from the sanding surface They are ideal for sanding painted surfaces and resist loading which allows for larger sanding coverage and faster sanding Can be used on wood or metal Use coarse grits to remove coatings, medium grits for bare surface sanding and fine grits for between coats sanding Use for flat surface sanding Rinse and reuse great for bare surfaces Clog resistant for longer sponge life Great for construction, woodworking, carpentry and home improvement projects like paint and drywall sanding 3M is committed to creating the technology and products that advance every company, enhance every home and improve every life