Review on Shepherd Hardware 9441 Threaded Appliance: Reliable and Versatile Solutions for All Your Needs by Junrey Jewel

Bought a few sets of these to fit under pull out bookshelves (plus side pocket door rails to prevent tipping) but found that rolling resistance was quite decent even when the bookshelf was not loaded high was the small diameter of the roller. Now I'm buying some 2" low profile reels to solve this problem. The 9441 reels are well constructed and I'm sure they will work well with devices that need to be movable but not free (I've used to (e.g. used some other Shepherd castors under an AV cabinet) but in this case they weren't quite what I needed, hence the 4 star rating.