A ring cheek piece introduces poll pressure as well as creating leverage on the mouthpiece, the 2 1/2 Ring version is the softest out of the 3 or 4 ring alternatives as the 1/2 ring softens the leverage on the mouthpiece and poll. An internal stainless steel chain covered with a bespoke non-toxic, UV resistant PVC tube offering an exceptionally soft and evenly distributed pressure over tongue and bars. � Especially good for the horse that objects to metal. � As with all our steel components, the chain and cheek piece will be covered by our lifetime guarantee