Forward Controls Design Duplex 3/4 Wrench for A2 Ccompensator/Flash Suppressor and Thinner 3/4 Wrench On Opposing Side for Suppressor Mounts Black JMW. Billet machined from 4140 the JMW is a double sided muzzle wrench that has a 3/4 wrench with a 0.23 thickness that works with the standard A2 compensator and on the other end has another 3/4 wrench with a 0.20 thickness. The slightly thinner end is designed to interface with a multitude of different muzzle devices. Fits: Dead Air's Keymo Key Micro suppressor mounts and Surefire suppressor mounts. The Joint Muzzle device Wrench is designed to be used with a torque wrench on 1/2 drive. To aid in applying the right amount of pressure the JMW's recommended torque values (20 to 30 ft/lb) are engraved on the wrench. Specifications for Forward Controls Design Duplex 3/4 Wrench for A2 Ccompensator/Flash Suppressor and Thinner 3/4 Wrench On Opposing Side for Suppressor Mounts: Manufacturer: Forward Controls Design Fabric/Material: 4140 Steel Color: Black Package Contents: Forward Controls Design Duplex 3/4 Wrench for A2 Ccompensator/Flash Suppressor and Thinner 3/4 Wrench On Opposing Side for Suppressor Mounts Forward Controls Design JMW: Duplex 3/4 Wrench for A2 Ccompensator/Flash Suppressor and Thinner 3/4 Wrench On Opposing Side for Suppressor Mounts Black