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