I find the grip that comes with the metal entrance disk to be hard to grab, especially when you are closing it with mean guard bees or opening it after bringing it back to the yard and bumping it a few times. So I added a bigger grip.
I set the disk it on my vise opened just as wide as the grip, and banged the grip out a bit with a flat point chisel. I then threaded in a key chain ring, or in this case a whole key chain. One friend asked "Oh, are you locking your bait hives now?"