Two sided wrench provides a 3-lug wrench for installation and removal of 3-lug muzzle devices as well as a wrench for complete disassembly and reassembly of the angstadt arms qd blast shield.3-lug wrench allows for installation and removal of 9mm 3-lug muzzle devices, wrench allows for complete disassembly and reassembly of angstadt arms qd blast shield, made from hardened steel with a black nitride finish, 1/2 opening for socket wrench attachment