The Real Avid Master-Fit Barrel Nut Wrench is a precision gunsmithing tool designed specifically for AR-platform firearms with 1-1/8" barrel nut specifications.Real Avid Master-Fit Barrel Nut Wrench (Model AVMF118BNW)1-1/8" size specification for accurate fitmentTitanium and stainless steel construction for durabilityAR-platform compatibilityFree-float handle design for enhanced controlProfessional-grade gunsmithing toolEssential for AR rifle builds maintenance and barrel installations this wrench provides the precise fit and leverage needed for professional gunsmithing work and firearm enthusiasts.