Built as an ergonomic, do-it-all tool that can handle your next AR build with ease, this Real Avid Armorer's Master Wrench is the next-generation tool you need to complete your cutting-edge workbench. Designed with AR builds in mind, this Real Avid Armorer's Master Wrench features precision surfaces that allow users to mount barrel nuts, castle nuts, muzzle devices and fixed-stock receiver extensions. The wrench is coated with a special, no-slip material for a secure grip as well. Finally, each Real Avid AR-15 Armorer's Wrench features a hammer on the reverse side of the head, complete with interchangeable heads. This allows users to select non-marring heads when installing pins and other components.