Sprenger Novocontact Eggbutt Horse Bit with D-shaped rings 40344-78 (16mm Thick, 65mm Ring)Sprenger Novocontact Eggbutt Horse Bit with D shaped rings 40344 78 (16mm Thick, 65mm Ring) oval shape enlarges the contact surface on the tongue for a soft influence ideal for super sensitive horses that do not take the contact confidently allows direct pressure transmission on the tongue and lower jaw due to the fixed mouthpiece lies steady in the horses mouth, gentle on the corners of the mouth the lateral contact helps horses that tend to fall out