Unisex Chrome-plated Steel M Hollow-out Collar Restraint with Magnet Locking Pins.
The collar has one O-rings for attachment to chains, ties or other bondage gear. Means you can securely lock your sub to the toys of your choice. You can even attach a leash to the collar and lead your sub around and make them follow all of your commands.
Female: The inside diameter is 12.0 cm, the width is 2.0 cm, the thickness is 0.5 cm.
Male: The inside diameter is 15.0 cm, the width is 2.0 cm, the thickness is 0.5 cm.