Full cheeks assist with steering, whilst the lozenge prevents the nutcracker effect of a single joint. Mouthpiece thickness: 16mm. Cheek height: 165mm. The Shires Brass Alloy Full Cheek Snaffle with Lozenge can be an excellent choice for young or green horses as these bits can assist with steering. Shanks on the bit create a positive action against the horse's cheeks when asked to turn. This design also prevents the bit being pulled through the horse's mouth and the brass material encourages acceptance whilst the lozenge prevents the nutcracker effect of a single joint. Available in Length: 4.5", 5.0", or 5.5". Mouthpiece Thickness: 16 mm. Cheek Height: 165 mm.