Good quality

Had to grind some concrete on a countertop I made. Worked really quickly and did what I needed it to do.

This has helped me tremendously. I had an uneven interface at two slabs that were down before we even moved in here, With this grinding cup it roughs up and cleans the surface nicely, I'm pretty sure I can get away with using this instead of acid-etching as I finish prepping for paint.

Grinds fast and well. Using the regular hold down nut to secure it is fine.