The Buffer Tube Nut Wrench by Boyt is a tool used to install a single-point sling adapter plate. This wrench features three lugs to better fit the buffer tube castle nuts. Along with a comfortable easy grip handle it is equipped with a tuff-steel construction. Type Buffer Tube Wrench Color Black Phosphate Series Wrench Gun Type Rifle Material Steel Run Time 1 Heating Area Rubber Black Model Or Style Steel