The Eggbutt cheek piece prevents pinching of the lips and gives a solid feel against the side of the face. It also prevents the bit being pulled through the mouth. The release is slower than the loose ring and also introduces light poll pressure.The moulded mouthpiece has been uniquely shaped and flattened. It is angled at 45 degrees to offer an exceptionally soft and evenly distributed pressure over and around the tongue. The internal flexible stainless-steel cable core has been injection moulded with a bespoke non-toxic, UV resistant, flexible synthetic material. The Bombers moulded material has been uniquely developed, to ensure 3 key attributes; texture, durability and comfort. Especially good for the horse that objects to metal or when you have tried every kind of bit without luck. As with all our steel components, the cable core and cheek piece will be covered by our lifetime guarantee.The Bombers Lifetime Guarantee does not extend to materials that can be chewed.