Amasawa 7 Pieces 4 Inch Diamond Wet Polishing Pads Set with Backing Pad for Granite Concrete Stone Ceramic Marble Floor Grinder or Polisher

I tried polishing a piece of concrete about the size of a kitchen table, using my rotary sander and it took my five hours. I initially tried using the pad supplied on my drill but that was no use as it kept bouncing, so switched to the sander. While I am sure these would be fine for polishing the edge of a piece of granite, say, you would be better off with discs a little larger on an angle grinder for a job more meaty. Having said that, they did the job, were as described and delivered next day.

Does the job, but will take a long time. Don't go to fast.

I'm very disappointed to say the mounting pad is not level, when spinning there is movement which puts unequal pressure resulting in scratches all across your marble.