Wheeler Delta Series Pro, AR15 Armorer's Kit, 18 Piece Set, Black, Steel/Plastic Construction 4005282 The Wheeler AR-15 Armorer's Kit has been engineered and designed with both the DIY gun builder and the seasoned professional gunsmith in mind. This 18-piece kit of professional-grade tools contains all the essential tools that you need to completely build and maintain an AR-15. Each tool in this 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 lower receivers" muzzle devices" and handguards" rest assured this kit has it covered. No more worries about damaged or misplaced tools with the latching hard case that ensures that your tools remain protected and organized wherever you go.