Remind: The velcro pad holder’s arbor is 5/8-11 female thread. Pad Holder’s max velocity / capacity is 5000 RPM. Please do not use it with high speed grinder or polisher. (a) 8 Pieces of 7 Diamond Premium Grade DRY Polishing Pad for granite marble concrete. 1 X Grit 50 100 200 400 800 1500 3000 Buff. (b) 1 Piece of 7″ (5/8″-11 Female Thread arbor) Polishing Pad and cup holder. (c) 1 Piece of 7 Spiral Diamond (Velcro Backed) Turbo Grinding cup wheel (24 Segments) for stone concrete travertine surface smoothing / sanding / grinding.