Advanced Armament 64185: This AAC Blackout Flash Hider Installation Tool is an excellent solution for armorers, gunsmiths and/or gun enthusiasts to quickly and easily install or remove any 3-Prong Blackout Flash Hider without marring its finish or damaging the teeth of a quick detach silencer interface when applying the required torque for the job. The tool attaches directly to any 3/8 Drive Tool and incorporates flats for use with a 3/4 Socket Wrench (both sold separately). Torque Spec: -28 20-30 lb-ft, 5/8-24 45-55 lb-ft, -24 45-55 lb-ft, M15x1 30-40 lb-ft, .59532 35-45 lb-ft, M13x1 Left Hand 20-30 lb-ft, 9/1624 Left Hand and RH 30-40 lb-ft