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 Chris Edgerton

Used this on my Bosch coffee grinder and everything came up and tightened as expected. Wanted to remove some of the thin layer and patch the poured concrete floor in my 4' x 5' powder room for the new tile. The photo shows the degree of wear after 3-4 minutes of continuous use for only half the room! About half is gone, and the height of the rest of the sanding pads is about the same as the protective case. How do people plan to complete larger projects like hallways or regular sized rooms with it? I would prefer the artificial "diamond" backing to be very durable. Let's see, $20 for that amount of time and space. Forget it.