The Wheeler Engineering 17-Piece Screwdriver Upgrade Set contains 15 specialty bits, a shaft extension and a square to hex adapter. Upgrade your Wheeler Screwdriver Set with these bits. Includes 15 specialty gunsmithing bits: Weaver/Ruger scope ring clamp bit, Redfield windage screw bit, Leupold windage screw bit, Ruger/Colt SA base pin latch nut bit, 1911 grip screw bushing driver, M1/M14/MIA rear sight bit, Millett rear sight adjustment bit, Mauser stock bolt bit, .062" pin punch, .093" pin punch, .118" pin punch, Glock replacement front sight screw bit, S&W rebound spring compressor tool, Remington M870/1100/1187 trigger plate pin punch, and 2" #2 Phillips.