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.