Drill Brush - Grout Cleaner - 2-inch Diameter Multi-Purpose Spin Brush Kit - Kitchen Accessories - Scrub Brush - Cast Iron Skillet - Scrubber - Bird Bath - Shower Cleaner - Bath Mat - Calcium - Rust

Like the set I bought for the different stiffness.

I used the white (softest) brush to remove very hard to remove stains on the stairs carpet. That took a lot of vigorous scrubbing that I could not have done well by hand, and would not have been reachable with usual cleaning tools. No damage to carpet. The brush still looks like new.

It was hard to fit into my drill at first. I only tried one brush that was supposed to be the most firm and it sucked. It took way to much effort to try to scrub anything off.The return policy is such a hassle, I went to Amazon fresh and they said they couldn’t take it because it’s a 3rd party seller. Then it says it will take back part of my refund for the shipping label and I have to package it and take it to USPS. I spent $20 on this already and now I would have to spend more money just to return it by that time I’d be getting like $5-$10 back