Designed by Jean-Marie Denoix; DVM; PhD. For horses lacking symmetry where the contracted side is supported by the wide branch. Soft tissue injuries that require support are helped by the wide branch while bone lesions can be helped with the narrow branch by reducing pressure. The projection medially on the narrow branch is to engage the bars. This is an asymmetric shoe with a wide branch to provide support under collateral or suspensory ligament injuries and a narrow branch to reduce pressure under subchondral bone lesions. (This is a lateral left front shoe or a medial right front shoe.) Please see the link below to choose A or B shoe. The view is from the ground side (not foot side) of the shoe. Sizes 11 and 12 are made from 1/2" (12.7mm) stock.