Wheeler Professional 72-Piece Gunsmith Screwdriver Set, 776-737: * Whether you"re working on a Browning Superposed, a Remington 700, a Smith & Wesson revolver or a Colt Single Action, you"ll find that there"s a bit to fit every screw on your gun * 54 hollow-ground flat bits range in size from .120" x .020" to .360" x .070", and include doubles in the thinnest sizes * Includes 15 specialty bits that are great for installing scope bases, getting you out of a pinch by providing a small pin punch when you really need it and keeping once-in-a-while lifesaver tools at your fingertips * Both sets come with 2 handles made from comfortable overmolded plastic, a regular handle and a slimmer shorter one for finesse work * Bit material: S2 tool steel * Bit hardness: 56-58 Rockwell C