The Weaver Split Ring Tip-Off mount was introduced in 1953. The now ubiquitous ring design, while not necessarily pretty, works just as well today as it did then. A slot in the aluminum base on the off side allows a hooked section of the stamped-steel top cap to slide in place over the scope's body. It is secured with two screws. The steel cross-bolt acts as a recoil lug, and its square head embeds into the aluminum base upon tightening. Knurling and a wide cross slot on the nut on the opposite side allow finger or coin tightening of the rings.