bought on ali express to replace a similar cage. this one only has round rings for the cage in square corner sizes like my old one. with the 50mm ergonomic ring allws snugg away and I can hardly get an erection. I've got this on for 72 hours now. let's see how long it goes without problems. I actively add this review in the comments. In my album are pictures of my devices
I bought the same quite comfortable but I can easily escape, probably by the metal weight as I only have one which can through. The other one is just small