This bit from Korsteel has a curve to it to reduce the "nutcracker" action and to alleviate pressure on the tongue and bars of the mouth. It prevents contact with the roof of the horses mouth, allows for effective communication between horse and rider whilst encouraging relaxation and salivation. It is a mobile bit which discourages fixing and leaning on the forehand and a mild bit designed to create less pressure than a standard French link and the copper link encourages salivation.