Jump'In D-Ring Lozenge Snaffle w/ Blue SteelComposition : Blue Steel. The Blue Steel alloy used in this JumpIn range is made of 54% carbon and 46% manganese. Effect : A D ring bit helps creating a frame and keeps the horse focused. It is a good alternative to a full cheek bit. The French mouth cannons make this bit more comfortable by relieving the horse from any pressure on their palate. Blue steel bit oxidizes with air and humidity creating a thin layer of rust which has a sweet taste. It