The WheelerA(R) Pro Series Ultimate AR-15 Armorer's Kit has been engineered and designed with both the DIY gun-builder and the seasoned professional gunsmith in mind. This 28-piece kit of professional-grade tools redefines what it means to build, maintain, accurize, and customize an AR-15. Each tool in this comprehensive collection is purpose-built for precision and reliability, giving you the confidence that you have the right tools for the job. From installing springs and detents in a lower receiver, lapping upper receivers for accuracy, or torquing down muzzle devices and handguards, rest assured this kit has it covered. No more worries about damaged or misplaced tools with Mfg: Wheeler Engineering