Professional’s Choice Bob Avila Copper Twisted Mouth Snaffle BitHorses like this bit a great deal; the copper makes it appealing to a horse's palate. It is very mild for a twisted snaffle as the larger twist is less abrasive in a horse's mouth. Weighted rings encourage a lower head carriage. Mouth: 5 1 2", Rings: 3" NOTE: This bit will rust when exposed to moisture. This creates a sweet taste in the horse's mouth and promotes salivation.