A fence post cap assembly is provided, the assembly comprises a first cap member designed to attach onto a fence post; a second cap member having a circumference larger than the first cap member, the second cap member is designed to fit over the first cap member, the second cap member having at least two apertures; and a loop member having a rounded portion leading to two arms with opposing ends, during an installed position, each of the ends are designed to fit within the apertures of the second cap member while the second cap member is placed over the first cap member thereby locking the loop member and the second cap member onto the first cap member.