This upgraded kit is the most complete set of master grade ar15 tools ever assembled to build, repair or customize your gun, housed in a convenient professional case.Featuring an extensive set of task-specific crowfoot wrenches for the most common ar15 assembly nuts and a heavy-duty armorers torque wrench.Kit includes both upper and lower vise blocks to confidently secure your gun parts for superior control.A comprehensive set of ar15 pin punches and armorers hammer pair with the 11-function bench block.To get you started, included is a step-by-step instructional book to guide you through the top 18 modifications made to ar15s.Upgrade to master grade!