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Like other reviewers, I was tired of scrubbing the shower by hand and getting poor results, so I decided to order this brush set. They work great! I've attached 3 pictures - 1 grimy "before", 1 part way through cleaning (you can easily tell where I haven't cleaned yet), and 1 "after." I would have never gotten these results when scrubbing by hand. I usually scrub for a while, feel like I'm not getting anywhere, then give up - but not today! I'm happy with the results achieved with these brushes. I used Soft Scrub with bleach to clean with.
This set includes three brushes: 1 flat brush that is 4" across, 1 flat 2" brush, and a rounded brush. I found the rounded brush to be super helpful in cleaning the smooth corners in our shower insert.
Silly public service announcement: The force of the drill will sling your cleaner around somewhat. Not gobs and gobs, but sort of a fine spray. If you happen to be the type of person who is excited to try these brushes and you jump in the tub with black leggins on, and use a cleaner with bleach in it, your leggins will end up with little bleach spots all over them. Obviously, not a problem with the brushes themselves, just a warning for other users excited to try them!