The eggbutt gag gives immediate contact and a direct, quick response. The fixed rings prevent pinching of the lips and the corner of the mouth, providing a smooth feel against the side of the face.
The large rings are designed to enable complete control. The fixed eggbutt action offers an extremely smooth and immediate draw up or release of pressure working in tandem with the riders' requests.
Decrease size, increase pressure. Use thin to command a bit more respect from the horse.
Increase size, decrease pressure. Less chance of chafing or cutting the corners of the mouth given the wider surface area.
Best as a playing bit for skilled players and old horses with a great understanding of the game.