Remind: This package is 16 Pieces of 7 Premium Dry POlishing Pad (can be wet use as well) And ONE TURBO GRINDING CUP WHEEL. 1 Piece 7″ Velcro Backer (5/8″-11 Female Thread arbor). Remind: Velcro Backer’s max velocity / capacity is 5000RPM. Please don’t use it with high speed grinder / polisher. PREMIUM 7 DRY Polishing Pad for Granite Marble Travertine. Dry pad can be wet use as well and brings VERY GOOD RESULT. 2 X Grit 50 100 200 400 800 1500 3000 Buff. And 1 Piece of 7 Diamond Turbo row grinding cup wheel for stone concrete travertine surface coarse grinding (velcro backed). Recommend 3500 – 5000 rpm. And 1 Piece of 7″ Velcro Backer / Pad Holder (5/8″-11 Female Thread arbor).