I always throw away protection but I have a chainsaw wheel and haven't cut anything yet! Works as promised! The only downside is that you can't fit a wheel guard to a 6 inch wheel.
It's protection not so exciting. It fits my old D28112 angle grinder and allows the use of 5 inch cutting discs. My grinder came with a concrete grinder guard/vacuum nozzle. This turns it into a safer angle grinder.
This god is much better than the one that comes with you, this one is adjustable by a handle you pull the locks and then move to where you want it and then move the handle back down it locks automatically, you don't really have to enjoy it or anything and it's a lot thicker and heavier