Keep your horse's mouth moist and responsive with the Double Jointed Blue Steel Hunter Dee with Brass Roller Disks from Centaur. Centaur's Blue Steel bits are made of a technologically advanced version of Black Steel (traditional Sweet Iron). Blue Steel oxidizes faster and easier compared to Black Steel. It will rust when in contact with air and humidity. This surface rust tastes sweet and naturally stimulates additional saliva production, encouraging better acceptance of the bit by the horse. Brass Roller Discs provide an additional comfort to certain horses by giving them something to play with, keeping their mouth quieter and more receptive to the riders aids. Features: King Dee bit Blue Steel mouthpiece Naturally stimulates additional saliva production Double jointed Brass Roller Discs provide additional comfort to certain horses