The Chifney, also known as an anti-rearing bit, is an in-hand bit designed for horses that are difficult to lead. The mouthpiece, a thin metal circle, loops over the horses tongue and behind the chin, and is attached to a sliphead, a single-strap headpiece than can be slipped on and off easily. The leadrope attaches to a single loose ring at the back of the horses chin.
It functions by applying an intense pressure straight onto the tongue when the horse pulls or rears, which means it has huge potential to cause serious damage if misused.