These tamper-proof plastic locks are designed to be used with high-end male chastity devices, such as the CB-6000. Each plastic clip lock can be used only once and has a unique number. Once fitted, the only way to get it off is by damaging the lock and there's no way to refit. This means if it's been tampered with or removed and replaced it will be clearly evident. Perfect for long distance Dominant/submissive relationships or power exchange play over the internet, for example. As they're made from plastic, they're also ideal for frequent flyers as they won't set off any alarms, or beginner chastity players as these locks are much lighter than a metal padlock.