The Korsteel Stainless Steel Copper Roller Mouth Eggbutt Horse Snaffle Bit is designed to help your horse learn to relax and accept a bit, an ideal choice for green horses. Its fixed, oval-shaped rings create a consistent contact. The copper roller encourages salivation and relaxation for a happier horse. It also applies tongue pressure, encouraging a lower head carriage. Its two joints distribute pressure over not only the tongue, but also over the bars of the mouth.