Halters with 4 knots are great for training. 4 Knot halters have 2 additional knots on the noseband. These halters are usually made using stiff rope.  Some clinicians/trainers feel additional knots on the noseband help the horse learn to yield to pressure. With a great variety of rope diameters, different size options, and a vast number of colors, you’ll find something that fits your needs.