Eggbutt Happy Tongue from Bombers.

The eggbutt prevents the horse from being pinched in the lips/corners of the mouth by the bit rings and provides a more stable feel against the horse. The eggbutt ensures that the bit remains steady in the horse's mouth.
Happy Tongue is a stable mouthpiece. It is curved with a port that provides maximum tongue relief. This is by far Bombers' most successful design – recommended for all young horses and those showing sensitive signs. The 4 available ports have been scaled according to each width. This ensures an exact fit over the bars and eliminates the play that occurs when the port is too wide. Happy Tongue is also available as a straight mouthpiece, which is slightly stronger.