Review on Sunjoyco 4-Inch Diamond Cup Grinding Wheel - 12-Segment Heavy Duty Turbo Row Disc For Concrete, Granite, Stone, Marble, Masonry And More by Julio Montano

Had to cut an angle into concrete for an outbuilding on my property. The concrete was a lip that was collecting water and it was seeping into the outbuilding. This disk was able to cut the concrete very well, but for my application it did not have any cutting advantages over a standard masonry cut wheel, but was easier to control and keep from contacting the siding of the outbuilding.I have a Milwaukee 4.5" M18 grinder that I put this wheel onto and it required the little adapter ring included with the wheel to center it properly on the drive shaft. I played around with it a bit and with the collar nut that tightens onto the drive shaft it centers and holds the cup very well in use, so if you lose the little adapter ring, fear not, it seems to work just fine without it once you tighten down the collar nut!