Remind: The velcro pad holder 5/8-11 thread. 25 Pieces of 5 Diamond Polishing Pad for granite marble concrete. 1 Piece of 5″ / 5 Inch / 125mm (UltraWide Segment) Turbo Row Grinding Cup Wheel for concrete stone (non threded, inner hole diamter 7/8″-5/8). 1 Piece of (5/8″-11 Thread) 5″ Velcro Backer/Pad Holder. Important Remind: Velcro backer’s max capacity is 5000RPM. Please don’t use it with high speed grinder / polisher. 5 Diamond Polishing Pad for granite marble stone concrete 25 Pieces. 5 X Grit 50. 4 X Grit 100 200 400. 2 X Grit 800 1500 3000 10 000. Pad Thickness is 3.2mm. Recommend 2500 – 5000 rpm (grinder or polisher speed must be lower than 5000 RPM). Wet or dry use (wet use recommended).