Erduoduo 2 Pack 4 Inch Diamond Cup Grinding Wheel 12 Segs Heavy Duty Angle Grinder Wheels for Angle Grinder

Works great to remove concrete and glue from subfloor. Hard to mount on angle grinder, may never get it off.

I had to remove about 3/4 of concrete bonded to an older concrete foundation. The newer concrete added over the older concrete foundation was securely bonded. I could not chip it off. Grinding was the only method for removal. I had about 4 sqft of 3/4 material to remove. I ended up using both grinding wheels and each still has some amount of usefulness left. I kept them just in case I needed to remove anymore material. I was very impressed with how they performed.

Cut the granite like hot butter

Attempted to use to remove thinset from concrete. Hardly any diamonds on the cutting wheel, was barely removing product, job would have taken forever. Not worth the hassle. ended up buying a Norton wheel for $45, cut right through the thinset no problem.

Dont buy these they dont work on a 4 1/2 grinder the cup is to small for the nut and they dont have much diamond in the blade didnt grind at all

Did a good job sanding my concrete countertops.

I used these grinding wheels to remove old paint from concrete steps.. they worked well. I ended up using both wheels in the package. The second one still has some life to it. The first wheel probably does too but after a while I noticed the paint was not coming off as easy as when I started. These are much less expensive than Home Depot so worth it.

Weak

I used four of these on an apox. 10 by 20ft. Sunroom to remove carpet glue from concrete floor. These will slightly eat into the concrete, so I plan on renting a concrete polisher to finish it before I start coating it with apoxy sealer. I strongly recommend a vacuum shroud to remove dust.

This removed the high side from a crack in my garage floor, about 6 feet long with a high side of 1/4-inch in less that 15 minutes.