Review on 🛠️ EEEkit 4-1/2-Inch Double-Row Diamond Cup Surface Grinding Wheel: Heavy Duty Turbo Concrete Grinding Disc for Angle Grinder - Ideal for Granite, Stone, Marble, Masonry, and Concrete Surfaces by Shawn Xayamonty

I've never used a diamond blade or grinder so it's hard to compare it to more expensive products but I can say it did its job very well and very quickly . As others have said, this thing shoots a lot of footage quickly. I was able to sand about 1/8 inch to line the door opening. There are many ridges and craters in this small area that connected several pours of concrete, but now it's mostly smooth and even. pretty decent finish on the back. I accidentally gouged out a spot on the floor trying to get straight to the door frame. Maybe I could smooth it out better if I removed the padding, but I can do a lot better than what I was originally dealing with. In summary, this is great for small jobs that require a fair amount of leveling. I'm not sure how long that will last on a larger job. However, I am happy.