@boschtoolsna csg15 grinder at work! I bought this grinder from @acmetools specifically in case I needed to grind walls, and sure enough I had to use it 2 weeks after I got it. This wall had a stud that was about 1/4 inch high for about 6 ft. I ground down the high spot then patched it with drywall mud and will prime it before tile. This 5 inch grinder made it easy because it was so light compared to the 7 inch grinders, and it was virtually dust free.