Made of heat-treated steel body and high concentration of diamond, these diamond grinding wheels are rust and corrode resistant. These also have a large diamond grind segment for more aggressiveness. Perfect for polishing, cleaning, and removing unwanted paints on materials as it can attain speeds up to 8,600 rpm and can be used for either dry or wet purposes This radical turbine cup wheel cuts very quickly on masonry, stone and concrete. Large grinding discs with heat-treated steel body for increased durability and wheel life. It is commonly used for dry/wet grinding of concrete, granite, stone, marble, tiles, masonry and other building materials to smooth uneven surfaces and remove flash edges.