The MB 04 is similar to the MB 02 in that it rotates on the tongue and applies pressure to the tongue, however, it has a small port (¼") which introduces some tongue relief for the horse. The port allows the horse to swallow and move its tongue as it moves forward and is relaxed, acting as a release or reward.The mouthpiece is curved and wraps around the bars and lips instead of pinching.
Independent lateral movement
Stainless steel mouthpiece
Curved mouthpiece does not pinch lips and bars
Copper inlay
An eggbutt is a traditional cheek style that prevents the mouthpiece from draping over the tongue, providing a more direct signal than the loose ring. The right side of the butt doesn't pull through the mouth or pinch. For a more versatile version, see the butt with hooks.