Review on 🧽 Drill Brush Cleaning Kit for Ultimate Bathroom, Shower, Kitchen, and Outdoor Scrubbing – Includes Bath Mat, Grout Cleaner, Dish Brush, Stove, Oven, and Sink Accessories by Brian Sage

That's awesome! I have 2,000 square feet of marble tile to clean and these brushes don't scare me. First I used a green round brush for the shower solution. A few bristles came out at first as expected and after the first few minutes I was only losing a 1 or 2 here and there. I have well water that is high in rust and even with fabric softener some sediment gets in and settles on the tile. This brush has broken the extension! I used the same brush on marble floor tiles as well and it cleaned them beautifully too! I also used a toilet brush which was much faster and did a great job with the rim and hole. I have not used the brushes on fiberglass, only on ceramic and marble tiles and porcelain. I would not recommend these brushes to anyone I know. When it gets warmer, I reach for stronger grill brushes!