Important remind: Pad Holder’s max velocity / capacity is 5000 RPM. Please do not use it with high speed grinder or polisher. (a) 1 Piece of 7″ / 180mm Diameter Velcro Pad Holder (5/8″-11 Female thread arbor, with watr feed hole). (b) 8 Pieces of 7 Diamond wet polishing pad wet use recommended. Can be dry use, but wet use make its life longer with better result for stone porcelain granite marble concrete travertine polish. 1 X Grit 50 100 200 400 800 1500 3000 10000. (c) 8 Pieces of 7 Diamond dry polishing pad dry use recommended. Can be wet use, but dry use make its life longer with better result for stone porcelain granite marble concrete travertine polish. 1 X Grit 50 100 200 400 800 1500 3000 Buff.