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. Details of this package. Many other sellers DO NOT attach the lock ring. 2 Piece of 4 Professional Grade Damo Glazing Buff Pad (they bring natural granite marble stone mirror like polished result). 14 Pieces of 5 (5 Inch) Diamond Polishing Pad. 3 X Grit 50 100 200. 2 X Grit 400. 1 X Grit 800 1500 3000. 1 Piece of 5 Diamond glaze buffer it brings mirror like polished result for granite marble. 1 Piece of 5 Diamond segmented cutting blade for stone concrete. 1 Piece of 1 3/8 (35mm Diameter) Diamond Core Bit / Hole Saw / Cutter for stone concrete travertine. And 1 X 5 (5 Inch) aluminum Velcro backer/Pad Holder.