The ideal multi-purpose nail. The Rifle E-slim nail is a great value for money, European head, slim shank horseshoe nail designed to fit in v-fullered and concave shoes. ESL has been developed from the normal E-nail in order to fit the thinner hoof walls better. In correspondence with the E-nail, ESL nails have the same head-size but the shank is slimmer and longer than that of E-nails. Size (length): 51mm.