Important Remind: Pad holder’s max capacity / velocity is 5000 RPM. Please do not use it with high speed grinder / polisher. (a) 24 Pieces of 3 Premium DRY 6 Steps Diamond Polishing Pad for granite marble concrete. 4 Pieces X step 1 step 2 step 3 step 4 step 5 stp 6. (b) 20 Pieces of 4 Premium DRY 5 Steps Diamond Polishing Pad for granite marble concrete. 4 Pieces X step 1 step 2 step 3 step 4 step 5. (c) 1 Piece of 3″ and 1 Piece of 4″ Diamond Glaze Finishing Buffer. (they bring natural stone granite marble mirror like polished result). (d) 1 Piece of 3″ and 1 Piece of 4″ backer / pad holder (its arbor is 5/8-11 Thread). 2.4mm thickness. Recommend 2500 – 5000 rpm (grinder speed must be lower than 5000 RPM).