Keep your sub confined all day and all night! This chastity device has a uniquely compact design, with an internal locking system that prevents a bulky appearance under clothing. Insert the key into the brass keyhole and turn to straighten out the lock. The lock can then be inserted into or removed from the hinge. With another twist of the key, your sub's penis is locked up tight. Made of stainless steel, this cage is non-porous and phthalate-free.