The Wheeler 1 1/8" & 1 1/4 AR-15/LR308 Barrel Nut Crowfoot Wrench is purposely builtfits many common aftermarket handguard barrel nuts. This professional-grade, hardened steel wrench is specifically crafted to stand up to the rigors of AR-15/LR308 assembly, maintenance, and modification; allowing to tackle any AR building or maintenance task. Each wrench is purposely-built with precision, allowing to install handguards, muzzle devices, and barrels with confidence.