Alysontech3-inch(75mm) Assorted Nylon Cup Brushes set nylon cup set with 1/4 shank 3Pcs

I own and operate three different 3D printers, and I use small rotary tool nylon brushes (think "Dremel" sized) to post process some prints. The nylon brushes, when used aggressively, do drastically reduce surface quality on prints, but I like the fact that the brushes won't chew through print walls like many other brushes/attachments would.I'm working to print face shield parts so I'm working with a lot of prints that don't need to look pretty but do need to be smooth and free of burrs, etc. I ran low on nylon brushes, got on Amazon to buy more, and these brushes popped up in the search. I decided to try them.For what I'm working now, these brushes don't work well. If I spin them at high RPMs, the brush just rips the print out of my hands which usually damages the print. At low to moderate RPM ranges, the brush just doesn't do anything.I'll be keeping these though, they may prove effective on very large 3D prints and other DIY projects that I do. I appreciate the fact I can handle these by the bristles and not worry about getting nasty little puncture wounds on my fingers. With that fact in mind I bet these would work excellent in situations where a wire brush is too aggressive, but a smaller nylon brush or the like isn't enough. I'll update this review as I use these.

So I asked a bunch of people how to remove concrete on a stone wall and no one seemed to know so I came across a YouTube video that said, use this, a drill and some winded since it has acetone. Low and behold, it worked!!! I got the grout off and now my shower looks much cleaner.

I bought these to remove some dried grout from tiles. They worked great in removing the grout without damaging the tile at all. Very little elbow grease too!

Came just as described. Using to refusing the brass around my fireplace and it's working wonderfully.

Not impressed, these things gently massage rust and debris, use a real wire wheel if you need to get work. I tried these on several different surfaces and it just merely agitated them.

Use it to strip paint on aluminum. Total junk. Did not do anything.

Worked ok. Not as good as a wire wheel.

They're at least durable. But I find them rather annoying to use and aren't as effective as I would like