3 Extra pairs of carbon brush included. Carbon brush is consumable parts of all types of polisher. They need to be replaced when they are exhausted, otherwise, polisher stop working. (c) 1 Piece of 4" Diamond Glaze Buffer (it brings mirror like polished result to natural granite marble). (d) 1 X 4" / 4 Inch aluminum backer/Pad Holder). (e) 1 X 4" / 100mm Diamond Turbo Row Coarse Grinding cup wheel for concrete and stone coarse grinding/polishing. (f) 1 X 4" Diamond cutting blade for granite marble ceramic (IMPORTANT REMIND: when cutting granite or marble, the thickness of granite marble should be less than 10MM). (g) 1 X 5" Diamond cutting blade for stone concrete travertine. (h) 1 piece of V30 (30mm / 1 1/4") Diamond brazed router bit to do full bullnose for 30MM Thick or High stone concrete travertine. › See more product details