The Shires Slotted Cheek Port Mouth Kimblewick is designed to offer enhanced control and comfort for your horse. The port in the mouthpiece allows for increased tongue room, while also applying gentle pressure to the roof of the mouth. The slotted D-rings provide the option to increase leverage on the poll, offering more refined communication. This bit is also known as a Uttoxeter Kimblewick. Mouthpiece thickness is 14mm, and the cheek height is 100mm. Available in 4.5", 5.0", 5.5" or 6.0".