D ring snaffles transmit the pressure from the rein aids directly onto the tongue and the lower jaw without leverage action on the poll. Due to the fixed cheeks the rein aids reach the tongue in a more direct way. The Sprenger Max Control D Ring is a double jointed training or correction bit, locks at a certain angle and operates like a straight bar. The locking mechanism takes effect when the horse gets strong or opposes the riders hand, unlocks immediately when the contact gets softer. Allows direct pressure transmission on the tongue and lower jaw due to the fixed mouthpiece. The lateral contact helps horses that tend to fall out whilst riding or approaching an obstacle.