Screwdriver bits are made from S2 tool steel and hardened to 56-58 Rockwell "C". 54 hollow-ground flat bits range in size from .120''x.020'' to .360''x.070'' and includes doubles in the thinnest sizes. Includes: Hinged storage box, 2 ergonomic handles, 3'' shaft extension. Hex to square drive adapter. 54 flat bits, 8 Allen bits, 4 Phillips bits, 3 Torx bits, 15 Specialty bits, Accessory tools for Colt , Remington , Smith & Wesson , Mauser, Glock , Garrand, * Ruger Specialty bits include: Weaver/Ruger scope ring clamp bit, Redfield Windage screw bit, Leupold windage screw bit, Mauser stock bolt bit, Millett rear sight adjustment bit, 1911 grip screw busing driver, Rugerr /Colt SA base pin latch nut bit, M1/M14/M1a rear sight bit, .062'' pin punch, .093'' pin punch, .118'' pin punch, Remington M870/1100/1187 trigger plate pin punch, 2'' #2 Phillips, Glock replacement front sight screw bit, S&W rebound spring compressor tool. 89 pieces.