Review on 4" Diamond Cup Wheel - Stadea CWD101A Concrete Masonry Grinding Cup For 5/8"-11 Threaded Angle Grinders. by Gregory Sirgio

My issue isn't with the performance of the product, it's with the fact the product doesn't match the description provided on the website.I purchased this wheel because I needed to grind a 4.1" counterbore into a concrete counter-top surface 2.3 mm deep for a flush-mount trim kit. The description indicates this is a 4" wheel, the technical specification indicates 4.2" however when I measured the cup wheel, the actual measurement is 3.955" (measured using digital calipers). The description and technical specifications do not match the product.That said, with the jig I created, I was able to move the grinder around a little and get the exact dimensions I needed and the grinding cup wheel worked as expected; I've used their concrete wet polishing pads and have had good results as well.