Aeroflex - 6" Steel Checklist Ring (Pack of 5) - 1.91" Diameter

Good product but very expensive (for the military its cheap, I know). Be aware, when you first latch them together, they can be rough to insert the ball to the socket but it gets on there stiff and good.

I used these when active duty in the Air Force. Good rings that are easy to open and stay closed. I plan to buy more

Most of the airline cable rings sold these days are only 5" long and make to small of a ring to manipulate easily if you need to open it often. The additional size is also nice if you have a ton of keys. High quality and reliable. We have purchased 30+ of these key rings for the team and haven't had one issue over years of use. They still look new and perform as good as the day we bought them.

I use them for my luggage tag holders... very strong and sturdy.

They work well, but they are a bit too thick to go through the openings in brass luggage tags.