Crafted from heat-treated 4140 steel, the LBE AR-15 armorers tool is built to last and handle all of your AR-15 assembly needs. This versatile wrench includes features such as a castle nut, 3/4 inches muzzle brake, A2 receiver extension, 1/2 inches torque wrench, take-down/pivot pin, bottle opener, standard barrel nut, and free float barrel nut. With its rugged construction and multi-functional design, it's the ultimate tool for any AR-15 enthusiast.