They are ridden in a plain snaffle bridle and a simple dressage-style English saddle. Bridles may be double, pelham, snaffle or Kimblewick. Pelham bits add a ring for a snaffle rein, next to the mouthpiece. A true snaffle does not have a shank like a pelham or curb bit. Dressage required the horses to be ridden in a plain snaffle and split bit. Draw reins are commonly used, on the snaffle ring. To do so, the rider may place two reins on the snaffle. A thin or rough-surfaced snaffle, used harshly, can damage a horse's mouth. A snaffle bit is the most common type of bit used while riding horses. The loose-ring snaffle with a single- or double-joint is most commonly seen. Younger horses, three-year-olds, can compete with a snaffle bit. The bit used is a snaffle bit. A bit is a snaffle because it creates direct pressure without leverage on the mouth. It has elements of both a curb bit and a snaffle bit. A snaffle is sometimes mistakenly thought of as "any mild bit".