Eggbutt from Bombers.

Eggbutt prevents the horse from being pinched in the lips/corner of the mouth by the bit rings and provides a more stable feeling against the horse. Eggbutt ensures that the bit remains still in the horse's mouth.
The molded mouthpiece is uniquely shaped with its flatter middle section. The bit is angled 45 degrees to offer exceptionally soft and evenly distributed pressure over and around the tongue.

Inside the bit, there is a flexible stainless steel wire that has been injection molded with a non-toxic, UV-resistant, FDA-approved flexible synthetic material. Bombers' molded material has been uniquely developed to ensure three important properties; consistency, durability, and comfort. Particularly good for the horse that resists metal or when you have tried all kinds of bits without success. It is designed to provide accepted tongue pressure with minimal pressure on the bars.

Like all Bombers steel components, the wire inside the bit and the side parts are covered by a lifetime guarantee. This mouthpiece is not suitable for horses that chew on the bit. Therefore, the bit is not covered by warranty or right of complaint if the damage has occurred because the horse has chewed on the bit.