The Herm Sprenger Copper Plus Double-Jointed Loose Ring Snaffle Bit has an anatomically-shaped 18mm Copper Plus mouthpiece with a rotated center link and 70mm stainless steel rings. The shape of the mouthpiece encourages the horse to accept contact, while the link lies smoothly across the tongue to allow for independent left and right rein communication. Copper Plus is an alloy developed specifically for bits to provide greater strength than copper alone, but still encourage salivation to help create a soft mouth. Sprenger Copper Plus DJ Loose Ring