This pack carries (a)-(d). Many other sellers DO NOT attach the lock ring. (b) 28 Pieces of 4 / 4 Inch Diamond Polishing Pad for concrete travertine granite marble quartz. 5 X Grit 50 100 200 400.
2 X Grit 800 1500 3000 6000. (c) 4 Pieces of 4 Professional Grade Black Final Glaze Buffing Pad (it brings mirror like polished result to natural granite marble). (d) 1 X 4 Rubber backer/Pad Holder.