Stubben STEELtec Slow Twisted Gag Bit acts on the lips, tongue, bars and palate. Slow twist increases the impact of rein aids on the mouth and poll. The reins are attached by special leather gag cheeks to the eyelets on the rings of the bit. Increased tension lifts the bit in the horse's mouth and applies poll pressure as well as bearing on the tongue and bars. Moderate severity. Great for horses that tend to get strong.