I am very, very surprised that nobody has mentioned the tollyboy. From everything I've read, once it's fitted properly, and locked on, it stays on. No wiggling out of it. No slipping it off. No anything. It can be worn permanently, since you can urinate and shower with it on, and it can be worn under any type of clothing. Again, from what I've read, with the inverted locks, it can't be picked either. It comes with many added features that the others don't, such as an attachable butt plug that can't be pulled out, and thigh rings so the thighs can be locked in a way that the wearer is forced to sway like a girl when he walks. I would love to hear from anyone that has actual experience with one. They run about the same price as the neosteel, and the goethals.