High Quality: These polishing pads are made of diamond powder and resin powder for wet and dry polishing, 50-150 grit suit for wet or dry polish; 300-3000 grit must be used with water to ensure the best polishing results.Easy to use: Hook and Loop backing, easy installation and removal, convenient for you to change out. Save time, improve work efficiency; easily connect to your variable speed polisher, angle grinder. Never use with High Speed Grinder