This Diamond R 5.5 in. Forward Set Full Cheek Stainless Steel Bit gives a soft, even pressure across the tongue, bars, and lists. The center barrel has limited movement to prevent the bit from scissoring down into the tongue or up into the palate. The copper roller provides some movement helping to pacify the nervous horse. The full cheek provides pressure on the opposite side helping to school a horse in turning. It also eliminates the risk of pulling the bit through the mouth without the use of bit guards.