French mouth Full cheek blue steel bit with copper ringsComposition : Blue Steel . The Blue Steel alloy used in this Jump'In range is made of 54% carbon and 46% manganese. Effet : a full cheek bit has a direct action on the horse's mouth with no lever effect. This is the bit that will create the best frame possible and that is why it is perfectly adapted to young horses. The French mouth cannons make this bit more comfortable by relieving the horse from any pressure on their palate. Blue steel bit oxidizes