4 in. JHX Wet Diamond Polishing Pads for Granite/Concrete (Set of 7) with 4 in. Semi-Rigid Back Holder JHXR205SET8 - The Home Depot
Pomsare 5 Inch Hook and Loop Backing Pad with 50PCS Sanding Discs, Angle Grinder Attachments with 5/8-11 Threads, Sanding Pad for Wood Sanding Buffing Polishing(80/120/240/320/600 Grit) - Amazon.com