Eggbutt bit from Bombers.

The eggbutt bit 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 bit ensures the bit remains steady in the horse's mouth.
Bombers Moulded Preferred Contact features cylindrical sides and a flat center piece.
The cylindrical sides curve over the lower jaw and bars, while the flat center piece lies flat over the tongue. The center piece is a flat oval circle angled at 45 degrees to rest evenly against the tongue and palate. The jointed section on either side of the tongue plate allows the cylindrical sides to act independently and provides stability to the center. Moulded bits are good for horses that do not like metal, or when you have tried everything else without success.

Like all Bombers steel components, the wire inside the bit and the side parts are covered by a lifetime warranty. This mouthpiece is not suitable for horses that chew on the bit. Therefore, the bit is not covered by warranty or claims if damage occurs due to the horse chewing on the bit.