The Real Avid Master-Fit Delta Ring Barrel Nut Wrench is purpose built and specialized for precise fitment to confidently deliver torque to Mil-Spec delta ring barrel nuts. Titanium coated stainless steel construction provides tight tolerances for solid nut-gripping strength and enhanced no-slip tool control. When paired with the Master-Fit 1/2" Drive Torque Wrench, this Master Grade combo will take your gun building experience to a whole new level. The Master-Fit Delta Ring Barrel Nut Wrench also works with any standard 1/2" drive wrench.