 Another bit that combines direct pressure and leverage in a unique manner is the Gag bit, a bit derived from the snaffle that, instead of having a rein attached to the mouthpiece, runs the rein through a set of rings that attach directly to the headstall, creating extra pressure on the lips and poll when applied.Usually used for correction of specific problems, the gag bit is generally illegal in the show ring and racecourse.Bits and the behavior of horses while wearing bits have made their way into popular culture outside of the horse world.