Sprenger Novocontact Eggbutt Horse Bit with D-shaped rings 40356-78 (16mm Thick, 65mm Ring)Sprenger Novocontact Eggbutt Horse Bit with D shaped rings 40356 78 (16mm Thick, 65mm Ring) oval shape enlarges the contact surface on the tongue for a soft influence designed for horses that occasionally pull against the hand but are too sensitive for stronger bits 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