I was recently informed that Lee sells their die locking rings as a separate product, rather than only including them with their dies.
I ordered a three-pack of their rings (same price as a single RCBS ring) and installed two of them on my RCBS .223 Rem dies. I’m exceedingly happy: I’ve never liked the set-screw rings, as the set screw always seems to get stripped and the rings never stay put. The Lee rings have a rubber o-ring rather than a set screw, and maintain a solid grip on the dies. In my experience, they hold better than the set-screw rings.
So long as one inserts or removes the die from the press by turning the ring (rather than the die), the Lee rings won’t come out of adjustment. Additionally, the metal ring never touches the press itself, preventing any scratching of the finish of the press. Useful for people who like their presses looking nice.
I’ve always been a big fan of Lee products, as their products are inexpensive and high-quality, they’re a small/family run business, their decapping pins are all but impossible to break (even when a Berdan-primed case gets in the mix), and so on. Sure, I own some RCBS and other brand products, but I find myself buying more Lee stuff than anything else. (Great, now I’m going to spark a Red vs. Blue vs. Green vs. Red flamewar.)