This is the new standard for a professional armorer€™s wrench. Smarter, stronger, ergonomic. It fits your hand and your gun € precisely. The Real Avid Armorer€™s Master Wrench features best-in-class strength, precision fitment and ergonomic intelligence. Wrenches seat squarely for a no-slip fit on stubborn barrel nuts, castle nuts, muzzle brakes, or fixed stock receiver extensions. Industry first torque wrench attachment location is optimally positioned to provide consistent torque for all nuts. As a bonus, interchangeable hammer heads make the Armorer€™s Master Wrench a €œMaster€ hammer as well! This is the right tool for the job€¦ and for you.