Features. Longer pro impact power bits and drivers are designed to reach easily into boxes and panels. S2 Impact-Rated Steel for maximum life and a 1/4-Inch hex shank. 4-Inch bit extension with strong magnet to keep bits in place. 1-1/4-Inch precision machined bits are longer and easier to grip. 2-5/8-Inch nut drivers reach easily into junction boxes. Extended 4-Inch Phillips and Square bits for hard-to-reach fasteners. Bits are easy to find and fit securely in the storage case. Case has a spring loaded stay-shut latch and a hidden storage area for loose bits. 26 Piece Specifications. Material: S2 Steel. For Use With: Impact Drivers. Special Features: Strong Magnets, Longer Length Bits. Overall Length: 5.5-'' ( 14 cm). Overall Height: 1.9-'' ( 4.8 cm). Overall Width: 4.7-'' ( 11.9 cm). Weight: 1.2 lbs