Shaped like a D, the King Dee's flat side provides slight lateral guiding, and also prevents the bit being pulled through the mouth.; The space age polymer provides for a gentler bit for a happier horse.; The unique Apple scent encourages horses to accept the bit.; Cheeks and rings are made of a top grade stainless steel.; Mouthpieces are made of non toxic, soft, flexible and long lasting polyurethane to help protect the horse's teeth.