Plate Specifications: Fits most regular swing machines. 17" diameter. Universal clutch plate. Max RPM 175 Cup Wheel Specifications: Coarse grit for terrazzo, hard material, hard stone, concrete, marble and granite. Engineered to provide 30% faster stock removal. Manufactured with high quality synthetic diamond coating that provides for a more consistent diamond scratch pattern. High diamond concentration for long life and aggressive material removal. Large grinding segments with heat treated cup design. Wheel features air holes designed to aid in and maintain a cool stable cutting pattern and reduced wear. Wet or dry use. Comes in black, green, gold or red. Note: Picture or Paint may not match but quality is the same!