Speaking of urethras, a curvy stainless steel urethral plug is also included. The hollow plug screws securely to the tip of the cage (it can be removed while the cage is still in place, too), so it'll stay steady when/if in use.
To get them locked up tight, first apply some lube. Then, gently pull their testicles through the ring before bending their (non-erect, please!) shaft downward into the cage. A classic padlock and two keys are included - keep at least one of the keys in a very safe place, since the padlock isn't a type that can be easily picked.
In body safe stainless steel, the Blue Line Urethral Play Cage is easy to clean using warm soapy water or a good toy care fluid/foam, but it can also be boiled or bleached for more thorough sterilization.
* The Urethral Play Cage measures about 3.5"/9cm long and is 1.5"/3.8cm in diameter at widest point. The scrotum ring is 1.9"/4.8cm in diameter