JP Korsteel offers the unique JP Curved Design. This unique design features curved bars that prevent the bit from hitting the roof of the horse's mouth and eliminate the nutcracker-like action that can pinch a horse's tongue. Features an oval link mouthpiece which relieves some of the pressure on the tongue when the rein aids are applied. Because the link is rounded, this mouthpiece is considered slightly milder than a French link, loose rings which help if your horse braces against the bit to evade the rider's rein aids and sweet iron which is a combination of iron and copper. The rust that forms over time is believed to encourage salivation and thus relaxation in the horse's jaw.