Asia Pacific Construction diamond polishing pad 5 inch 8 pieces rubber backer wet/dry granite concrete

8 Pcs of 5″ Diamond Polishing Pad (3mm Thick) for concrete stone and 1 backer.
8 Pads are: 1 X Grit 50 100 200 400 800 1500 3000 10000superbuff.
1 Pcs Rubber Backer (5/8″ Thread arbor). Backer has water feed hole, wet polishing no problem.
Remind: Velcro Backer’s max capacity is 5000RPM. Please don’t use it with high speed grinder.