This restraint device is made of high grade surgical stainless steel, no rust, high resistance, and smooth texture. Hook up to ropes and other bondage equipment, keeping a strong hold on its wearer. 
There’s 5” of wearable length in the ball and portion of the hook, the hook rests against the back while the ring (1.5” diameter) is used to connect to ropes.
Easy to sterilize and can be used as temperature play (warmed or cold)