German Martingale set comes with both thespecialized reins and martingale. The martingale forks go through the bit and snap to any of the four D rings on the reins. Change the rein settings to increase or decrease pressure. Neck and girth pieces are fully adjustable. The martingale and forks are made of soft pliable brown leather. The reins are brown cotton web with leather stops.Buckle end reinclosure. Stainless steel hardware. One Size.