Specifications and Features: 4140 Steel Powder Coat Finish AR-15 Multi-tool, Ultimate tool for an AR-15 owner constructed of hardened steel and will do every function you need. Install and disassemble free float tubes, barrel nut, .5"" drive for socket wrench, extension tube, carbine stock, screw drive tip for butt stock and compensator. Made of 4140 steel with new powder coat finish. Need to buy in bulk or on government contract? Just email us and we will be glad to send you a quote.