Angstadt Arms AA093LBCWR: 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