The Lucifer's Stainless Steel CBT Chamber is created for torture.
Simply snap the metal band, around the scrotum, and secure it with the built-in lock. Turn the screws -- the four pointed screws -- and apply extra pressure to the scrotum.
Want to do more? There's a steel O-Ring in the front. Add ball weights, a collar, whatever your heart and imagination can think of. Do as you please since your partner's balls aren't going anywhere.
Comes with integrated lock, allen wrench, and 3 padlock keys.