Review on KSEIBI 4-1/2 Inch Concrete Grinding Wheel for Angle Grinder | Diamond Cup | Double Row | Polishing & Cleaning Stone, Cement, Marble, Rock, Granite | Surface Grinding (644030) Gold by Robert Sample

I read the great reviews and decided to give it a try. This disc cuts through the old thin layer and concrete like butter! And when I was done, the disc looked almost as good as it did when I started! Without a doubt one of the best things I've bought from Revain. just know This creates large amounts of powdery dust. I used a shop vacuum to pick up dust and dirt (keep the filter clean to maintain suction) but it wasn't enough to clean the air. I put a fan by the exit door and that helped too. You must wear eye, ear and respiratory protection. One more thing, I used this on a 4.5 inch grinder I got from Harbor Ft. I figured the dust would kill the mill motor so I bought a cheap one to throw away. Surprisingly it survived and after I cleaned the motor with the electric atomizer it still seems to be working fine. Be very careful when turning on the grinder, this blade can seriously damage any part of your body that gets in its way!