Billets are an extremely important part of an english saddle and should be inspected regularly. Most english saddles have 3 billets. This not only allows the rider a spare billit if one breaks, but it can also provide an adjustment option. For horses on which the saddle sits nicely, neither slipping forward or back, the first and third billets should be used. On horses where the saddle slips back, the first and second billets should be used, on those that the saddle slips forward, the second and third should be used.