A ring bit is a horse bit that includes a ring passed through the horse's mouth and encircling the lower jaw. There are three primary designs. The most common ring bit design today, sometimes called a Dexter ring bit, is used in conjunction with a snaffle bit, while a historic ring bit design was also used on some spade bits in certain vaquero traditions originating in Mexico. A third style is a simple ring, the Tattersall or yearling bit, used alone on a bridle, usually for use in-hand.