Mighty Mule Gates FM133 Pin Lock for Opener Front MountAdd the pin lock (a substitute for the clevis pin at the front mounting point of all models of swing mighty mule gate openers) to help prevent theft of the opener, or to the chain of the mighty mule slide gate openers to prevent unwanted manual access. Pin lock Substitutes for the clevis pin In front mounting point of the opener To prevent theft of opener arm Can be used with all model gate openers.