6 Cable stainless steel posture collar with an Integrated padlock and ring.
Three guides keep the cables in uniform circles. A hinge mechanism closes the collar. A circular ring is attached to a small flat plate with a hole and a hook on it. The hole on the plate slips over a post on the hinge, and the hook is captured by the lock shackle. Close the lock and you're in. The cables are braided and plastic coated. Elegantly designed.
Comes with 3 keys. Diameter measures approximately 5-1/2”. Weighs 14oz.