These pulley-style draw reins are constructed of premium harness leather with quality brass hardware. The pulley design allows the reins to slide more smoothly and freely. When adjusted properly, these reins place both downward and inward pressure when rider engages the reins. A helpful training aid when working on a horse's headset and framing!This is a more advanced piece of training equipment, seek out a trusted equine professional for guidance and education on proper use.