I like almost everything about these castors. I use them for a full size crib (9 in total), they roll smoothly and seem to be of high quality. When I screwed them into the frame with a T-Nut, it took me a little effort to get through the first thread. Like it's a little different. I know it was a roller thread, not a nut. Every caster had the same problem. But once it started, it was great going in and out. The main thing I don't like about them is that they come in packaging with no markings to indicate what they are. They have a label placed on them by Revane but are otherwise unmarked. The problem I see is that they look like any other caster so it would be easy to mislabel them. I hope I got what they say I have.