Pro Impact Power Bit Set, 26-PieceLonger pro impact power bits and drivers are designed to reach easily into boxes and panelsS2 Impact-Rated Steel for maximum life and a 1/4-Inch hex shank4-Inch bit extension with strong magnet to keep bits in place1-1/4-Inch precision machined bits are longer and easier to grip2-5/8-Inch nut drivers reach easily into junction boxesExtended 4-Inch Phillips and Square bits for hard-to-reach fastenersBits are easy to find and fit securely in the storage caseCase has a spring loaded stay-shut latch and a hidden storage area for loose bitsPhillips, square, and combo tips are color coded by size: green- #1 size bits, red- #2 size bits, black- #3 size bitsSlotted tips and nut drivers use ASME standard color coding