Dutton Bits D-Ring Chain Bit with Copper RingsDutton Bits D Ring Chain Bit with Copper Rings Dutton Bits Full Chain Mouth that adds tongue pressure and evenly distributes equal pressure over the bars Lays nicely over the tongue and bars for leverage or "hold" pressure on the bit Small Copper Rings for added salivation Mouth Piece: 5" Diameter: 3" The Dutton Bits D Ring Chain Bit with Copper Rings features a practical D ring design paired with a chain mouthpiece, offering precise control and