Review on 🛠️ Medium Yellow Drill Brush 360 Attachment Kit - All Purpose Cleaner Scrubbing Brushes for Bathroom Surfaces, Grout, Tubs, Showers, Kitchens, Autos, Boats, RVs by Chris Litton

Tiles and grout processed better than expected. I used Bar Keepers Friend thin paste (https://www.amazon.com/Bar-Keepers-Friend-Powdered-21-Ounces/dp/B008EN9XUI/ref=sr_1_4_a_it?ie=UTF8&qid=1543883000&sr=8-4&keywords =bartender% 27s+friend) which I applied with a sponge before using the Black & Decker cordless drill brush. The large flat brush worked on flat tiles while the rounded brush worked on the corners. I haven't had any issues with the brush falling apart as other reviews have reported. It squirts but I knew it was going to happen. Not as effective when the drill's battery is low, probably due to reduced RPM. I give it 4 stars for ease of use because the drill gets heavy and tends to loosen a bit, but I don't think the brushes would be as effective if I used a smaller drill. I know it saved me a lot of time cleaning my shower and it did the job much better than a manual brush.