Carbon Brush is consumable parts of all types of polisher. They need to be replaced when they are exhausted, otherwise polisher stop working New Version Wet Variable Speed Polisher. Many other sellers DO NOT attach the lock ring. 16 Pieces of 5 (5 Inch) Diamond Polishing Pad. 3 X Grit 50 100 200 400. 1 X Grit 800 1500 3000 10000. 1 X 5 Diamond Glaze Buffer (it brigs mirror like polished result to natural marble granite). 1 X 5 Diamond Turbo grinding cup wheel working layer (velcro backed, use with the aluminum pad holder). And 1 X 5 (5 Inch) Aluminum Velcro backer/Pad Holder.