Copper Roller Link Mouth Full Cheek Bit Double-jointed mouthpiece with copper roller link encourages horse to salivate. Helps keep mouth soft and moist. Great bit for young or nervous horses. This bit features 6 1/2 cheeks and a 11 mm mouth. All our Bits are High Quality German or Stainless Steel made by Coronet or Korsteel. Size: 5.