that look like very inconvenient. But I guess it’s the goal. How can it hurts your balls if you try to remove it ?
During my fetish days, I used one of those things. The ring closes around the base of your scrotum, and once locked, there is no way to pull your testes out without squeezing them impossibly small. To pull my balls out while locked, I would literally have had to break them like a balloon being popped. There is no way out without the key, unless you break the device apart, which itself is risky because of the collateral damage!
I've done the chastity thing. It is not going to stop any urges. It is going to make you aware of your dick 24/7 and the denial is going to make you horny as hell. That is the point of wearing a chastity device. Depending on sizing you either won't be able to get erect, or you will and it will be restricted and hurt like hell. Chastity in my relationship is likely one of the reasons I went so far down the porn road. You won't quit watching porn when locked up and because you won't be able to masturbate and end the session, you will watch it for longer. Trying to get the rush that an orgasm gives you without getting the orgasm is likely going to push you into darker porn. Chastity can be a fun thing, but this is not the reason to do it. Also plastic devices are not hygienic. Stainless or nothing.
This is certainly my experience. I read an article by a journalist who tried one of these as an experiment. His report was hilarious.
cold shower and by the way you probably get hard and aroused because you fantasize too much so keep that in check
Be very careful because chastity cages can turn into a fetish in/of itself. Not a very manly one either. I have come to realize that a man is not supposed to be in one of those things. Before you write me off, surprisingly I've actually worn countless of them! ... (bought, thrown away, bought again etc) hoping it would be a fun way to connect with a girl and also maintain self control. For me - I was wrong. Wearing it makes you constantly aware of it and it leads to unhealthy thoughts. Maybe it will work for you, but for me it was a road I could not go down any longer! Best of luck.