Jump In Verdun Bit Double Jointed Copper Rings Blue SteelVerdun bit with 16 mm mouthpiece in Blue Steel and copper rings The Blue Steel alloy is made of 54% carbon and 46% manganese Blue Steel bits oxidize when exposed to air and moisture, forming a fine layer of rust with a sweet taste that naturally stimulates saliva production in your horse The more your horse salivates, the more easily it will accept contact with the bit During the oxidation process, the color will shift to grey brown The Verdun rings