I bought this to cut through the concrete floor in my garage. I put this guard on a Bosch GWS 10-45P angle grinder and it fits perfectly. I'm not sure what other people mean by being loose and unstable. I need to check mine. I also had to buy a Bosch hose for this, which is an additional expense. There's some dust when you dive in to start the cut, but then there's no dust when the wheel is fully inserted and the sheath is on the ground. One thing to note though: removing the wheel when you're wearing the fairing is a real pain. The shroud opens like a Pac-Man and I broke my knuckles on one side of the shroud when the nut came loose. I started wearing soft knuckle gloves, which isn't bad, but be careful with that.