We were replacing tiles in the kitchen and needed to remove the old adhesive from the floor. I tried sanding and immediately realized that the dust in the kitchen would be too thick. I stopped by and ordered one of these for our 4" hard grinder and it worked. It's versatile, but my husband does a great job at any job, so he quickly adapted it to the mill. Our diamond cutting disc could be a bit bigger. curved because the bristles of the dust guard are so stiff that the saw blade is held too high off the ground. He could press on it and it held perfectly. The only thing that wasn't great was the vacuum adapter that came with it, which really doesn't go with anything I already have on my vacuum. It appears to be the same size. It has a tapered fit that pushes into the dust cover, although it pops out with use. All in all we recommend this as a real help to keep the dust in the air and in the workshop vacuum.