SPTA 15pcs Diamond Wet Polishing Pads Set, 4 inch, White, 50#-6000#, For Granite, Concrete, Marble, Stone, Tiles, With Floor Grinder or Polisher

Was able to remove acidic pitting on marble counter and restore shine.

I’m using them to polish rocks as part of my rock business. They were amazing on bigger pieces and I paired them with the ZFE wet polisher that I also got here on Amazon. The different amounts of grits annd durability are amazing giving the stones an amazing shine. They stay on the pad without flying off like some of the lower quality ones do. Super safe and easy to use on all different speeds.

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

I use these for polishing rocks and gems. Very easy to use with a good variety of grits.

I had no problem attaining a high shine on very hard granite. Keep in mind these are meant for edge polishing not surface polishing. You can polish a surface such as a table top but the result will be wavy due to the small diameter of the polishing pads. I posted before and after pictures to show my edges had saw marks in them. The 50 grit pad had no problem removing the saw marks. I spent some time with the 50 grit but after that it took about 2 minutes per pad to get a desirable shine. Note, it takes more time but I let the stone dry before moving to the next pad. Doing this ensures I didn't miss any spots and I can move on to the next finer grit. Having the right equipment make the job much easier. I use a Suhner meant for this exact purpose (see photo). It has a water feed that pushes water through the center of the pads. I used to use similar polishing pads in the 90’s and don’t understand why the backing pad that comes with the polishing pads didn’t have a hole in it for water feed machines. It was simple to drill a hold through the backing pad (see photo). Another issue with these pads is that the two finer grit pads are both brown. You can count on the numbers on the back of the pads to wear off so I recommend making a card that will remind you which color is a certain grit. That is blue is 50 grit, yellow is 100 grit, and so on. I highly recommend these polishing pads. If you found this review helpful, please click the ‘helpful’ button. Thanks.

I have acid water. The acid water damaged the surface and Ed cement powder out from around the aggregate. I use this kit on a drill head and was able to grind down the aggregate back to the same level as the cement. The end product is a super smooth concrete surface.

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.

The SPTA polishing pads have been the best so far. These are fourth set of pads I've used, and have proven to be worth the extra cost. About $10 more than the cheapest That I have purchased. The SPTA pads remove material quicker and last longer than the no name polishing pads that I've used previously. I will definitely be using SPTA on my next job.