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

Good value. Works as intended with a predictable life.

Esto se gasta en 2 horas

Good product for price! Better price than box stores and same quality

The embedded diamonds are spars and straite the concrete as you grind it. If youre just rough grinding, and dont need them to last very long, these work well enough.

Good item and good product

What I like about this 4” grinder disc is, it fits perfect on the 4 1/2 grinder. I used the disc to clean up old grout and tile adhesive. Cleans up excellent. I live in Puerto Rico and got it in a week.

I used this product to grind paint off of a smooth concrete block foundation. 1 wheel removed about 40 sq ft. of paint down to bare block.

Might take a few of these to do what you want to do as they seem to wear faster than I thought they would, but they do work well while they last.. One wore out in about 15 mins of smoothing old concrete edges

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.

I bought these to level out some cracked concrete for a patch and they are quite effective.