Great for Wet and Dry Using - This polishing sandpaper made of waterproof silicon carbide, electro-coated, It works well dry and wet sanding and we need to do a 100% quality-check when we shipped to ensure the paper not easily fall off when in use. Convenient and Easy to Identify - Good variety of grits from coarse to smooth. The sandpaper grit is on the back of the sandpaper for easy identification.