Full cheeks can be useful for horses that are unsure of the bit, because the bit doesn't move around so much in the mouth as it would do with loose rings. The fixed nature of the mouthpiece can encourage the horse to stretch into the contact. The full cheeks also help to prevent pinching at the sides of the mouth.

The arms of the full cheeks assist with steering, as pressure is applied to the cheek when a turning aid is given. This can be useful for young horses, or schooling and training purposes. The cheeks also ensure that the mouthpiece remains in a central position and cannot slide through the horse's mouth.

The blue sweet iron mouthpiece from Bombers Bits oxidises easily, creating a warm, sweet taste that promotes salivation and acceptance of the bit.

Please note that the blue will fade with use.