KATSU Diamond Grinding Cup Wheel 115mm Angle Grinders Diamond Sanding Disc for Marble Concrete Masonry Granite Stone 99035355

Used this to rejuvenate chronically stained patio flagstones (concrete/stone mix) - worked really well - upset I wasted many hours trying to do the job with flap-sandpaper wheels and hard-wire wheels - success in mere minutes with this diamond wheel - great value too - - - can't speak too highly of it. Remember you can remove the thin copper bush if necessary to fit your grinder. I also used a rubber washer, about 3 mm thick, to give a more satisfying fit.

Seems strong

To be fair I was expecting it to be pants. But it's awesome. Used to flatted out concrete and brick. Worked a charm

This product is highly capable of grinding an uneven surface to a level finish, although you must enclose it with a guard as it throws chips and dust everywhere. This product is capable of grinding hard materials like stone and concrete and softer materials like plaster. All in all a good product.

Grinding down tile adhesive and screed and concrete floor great job total area 28 square meters bought 2 but only needed 1

First off, the disc works for grinding concrete and masonry, and it does a reasonable job of this.My main gripe is that the wheel feels unbalanced in use. My Makita grinder wobbles and shakes much more with this compared to other grinding/cutting discs.Also because the wheel is so heavy, it creates a gyroscope effect, which means that it becomes difficult to accurately change angle of the grinder body when the wheel is spinning.It did the one off job I needed it to do, but if I was regularly grinding concrete I would look at better options tbh.

found out its better than i thought very nice product

I used this to smooth about six square metres of a concrete base. It cut through the rough surface easily producing a good finish and barely showed any signs of wear after the job was finished, so I'd recommend it.A note to buyers: the central hole has a brass ring pressed into it, and the disc may not fit your angle grinder unless you punch the ring out. It comes out easily enough though.