The Boundary Halter (AKA Peace Bridle) is used to clearly show the horse his boundaries without jerking, without chains or pain. It squeezes his head when he pulls or resists - you just hold the lead until he relaxes, releasing the pressure on himself. It is never for tying the horse! Comes with instructions, it is made of soft cord that is securely knotted and will not change size during use. Click enlarge to see halter in use.