AR15 Armorer's Barrel Wrench - Generation 2. Combo tool with many New Features/Tools to work and upgrade your AR-15/ M4/ M16Barrel Wrench for GI Barrel Nut, Free-Float Barrel Nuts with GI spacing, DD Barrel Nuts, and YHM ( 1 3/4) Spanner wrenchA2 ( 3/4) and 5/8 Flash Suppressor wrench, M4 Collapsable Stock Castle Nut wrench, A2 Buffer Tube WrenchFlat Blade Screw Driver for A2 Buttstock Plate, 1/2 and 3/8 Drive Compatible, Lower Receiver Push Pin Tool1/4 Hex Bit Drive Socket, 1911 Barrel Bushing Wrench, and a Tactical Bottle OpenerAll the Tools are Clearly Labeled.Steel ConstructionLength: 12.9Weight: 13.0 ozNcSTAR Patented Design: US Pat. # D703,502