JUMP'IN D-Ring Bit French Mouth Blue SteelComposition: This D ring bit features 16 mm cannons crafted from Blue Steel, an alloy composed of 54% carbon and 46% manganese. Known for its unique properties, Blue Steel oxidizes upon exposure to air and humidity, forming a thin layer of rust. This rust is sweet tasting, which encourages saliva production and helps the horse relax. Over time, the bit develops a greyish brown patina, enhancing both comfort and acceptance. Effect: The D ring design