The Real Avid Master Fit 3-Prong Flash Hider Wrench is a stainless steel wrench with a titanium finish. It's designed for use on 3-prong flash hiders that don't allow the standard application with flats. The Real Avid Master-Fit armorer's Crowfoot wrench heads are designed for gun nuts. They're made of titanium-coated stainless steel to reduce marring on gun parts. The wrenches are built for precise fitment and to apply torque.
Armorer's wrenches are used for various maintenance and assembly tasks on an AR15, such as tightening and loosening barrel nuts, castle nuts, and muzzle devices, and Real Avid is the name that Charlie's trusts, and you can too.
Manufacturer's Part Number: AVMF3PFHW
Note: Wrench shown in pics as an example. Wrench is not included.