SPTA 15pcs Diamond Wet Polishing Pads Set, 4 inch Pads for Granite Stone Concrete Marble Floor Grinder or Polisher, 50#-6000# with Hook & Loop Backing Holder Pads for Wet Polisher

These pads do a great job polishing large stone.

They worked fine. I perform the job with ease. And the quartz polishing came out professional in appearance! And I’m not a professional. It was my first time working with quartz! Very satisfied with my work and with these tools!

It seems to be a good quality product. I used it wet and dry. Didn't have any problems with the disc coming off.

The media could not be loaded. Polished this marble table great, went pad by pad multiple times with water, and the $95 harbor frieght polisher and sander. Had to buy a new backer pad for it but the pads worked and lasted well on it

Pleasantly surprised. I used a single one to do an entire shower using it to miter all the tiles instead of using bullnose or aluminum trim.

Diamond pads are great. Foam backer pad is crap, causes your grinder and arms to vibrate like crazy, wastes time recentering, and doesn’t last.We cast three concrete countertops, about 45 sq ft total, with specialty aggregate we added. We used a Ridgid diamond grinding wheel to expose the aggregate and then started with these pads. One 50 grit pad was used up polishing out the grinding swirls, then we progressed to 400 grit before using slurry to fill the pinholes.First of all, the hook and loop pad was mounted eccentrically on the plastic base, so even with no pad attached, the grinder vibrated like crazy. I fixed this by running the grinder and holding a piece of sandpaper next to the mounting pad to sand the edges until it was concentric.I centered the diamond pad on the hook and loop mounting pad, and within five minutes the Dewald 4.5” grinder is vibrating like crazy again. So I stop it and find the pad has moved off center. I have to rip the pad off and recenter it. Then I have to repeat that every 5 minutes. That gets old really fast, and after a couple of hours of increasing vibration you fell pretty beat up. About halfway to 400 grit, the problem solved itself: the foam backer and diamond pad flew off the plastic backer and crashed into the garage wall. Glad it didn’t fly off the other way and hit me. One trip to Home Depot for a good rubber mounting pad with decent hook and loop fastening and there is no vibration or need to recenter every 5 minutes.So pads are great. In hindsight, if there was another kit on Amazon with a rubber backing pad instead of cheap foam glued onto a plastic backer, I would have bought that one.

I did 3 grits on my concrete counter (50, 100 and 200). The counter is about 35 sqft. One of the 50 grit pad was almost worn out from it, but there are multiple 50 grit pads in the set. The 100 and 200 grit pads showed very little wear, so it seems just the 1st pass was the one the impacted the pad the most. I was not trying to get a granite like finish, I was preparing it for an epoxy finish. This product did what I needed. Note that with the pad being on 4", it is difficult to flatten a wavy surface over a large area, but it does a good job of creating a smooth texture if you have a flat surface to start.

Excelente