Most other lockrings are heavy and round off the very first time you tighten or loosen them. That results in having to do some backyard tool work using a flathead screwdriver and mallet to break the frozen, crappy lockring. This lockring, that problem doesn't exist with. The thick and durable notches for tightening or loosening can handle the job and then some. Have removed and installed my cog and lockring for cleaning and maintenance and have yet to see either notch show any signs of wear or rounding off. My best pick for anyone tired of cheapo lockrings that keep getting stuck and need to upgrade to.
I use this lockring on my 15t cog with my Mavic CXP22 wheelset, it holds very well. This lockring hasn't made the cog slip on me either. I've abused this lockring by installing it on other rears I have, and the installation grooves haven't chipped or bent, I was using a vice grip to remove it as well, which on most occasions deforms the grooves, but this one stays put and I'm very pleased with it.