Stübben Steeltec Dee Ring Bit with Copper LozengeThe D ring is completely pinchless while providing a gentle correction to resistance to the direct rein. Sweet Copper link for better acceptance. Cheeks of the D ring help to stabilize bit in the horses mouth. D ring minimizes pinching of lips and corners of mouth. Specific shape of the D rings bear on the outside of the mouth as a gentle correction to resistance to the direct rein. No pressure on the palate. No nutcracker effect. Association