EDiamondTools 5 in. Electroplated Diamond Grinding and Polishing Pads for Concrete, Stone or Masonry, Wet or Dry, #30/40 Grit TDP50030_THD - The Home Depot
7" Diamond Resin Masonry Sanding Grinding disc polishing pad 13+1 Pieces (Grit 30 - Grit 800) for stone concrete granite marble grinder polisher tile floor burnisher sander - Amazon.com
Concrete & Masonry Sanding Discs — Abrasives world