BARREL NUT WRENCH FOR ARMALITEA(R) AR-10A(R) The Precision Reflex, Inc. AR-10A(R) Barrel Nut Wrench is a heavy-duty tool designed specifically for the installation and removal of barrel nuts on ArmaLite AR-10 rifles. Constructed from 3/8" thick 1018 steel with a black oxide finish, this wrench provides exceptional strength and durability, ensuring it won't flex under pressure. It features cutouts compatible with both 3/8" and A 1/2" drive tools, allowing for versatile use with breaker bars, socket wrenches, or torque wrenches to achieve precise torque application. Key Features: Robust Construction: Made from 3/8" thick 1018 steel, the wrench Mfg: Precision Reflex SPECS: 1018 steel, black oxide finish. AR-10 fits ArmaLite AR-10 only.