The Wheeler Professional Armorers Wrench with solid steel construction includes six essential AR tools in one: castle nut wrench, torque wrench adapter, milspec barrel nut wrench, 5/8 inch rifle receiver extension wrench and 3/4 inch muzzle brake wrench. It features an overmolded rubber handle with torque specs. It is A2 flash hider wrench and 1/2 inch torque wrench compatible. Steel construction Free float barrel nut wrnech Buffer tube castle nut wrench A2 flash hider wrench 1/2 inch torque wrench compatible