Impact Driver Bit Set with ProFlex torsional recoil system features energy absorbing technology to extend the life of the bit. S2 impact-rated steel bits built for heavy-duty applications. Extended length 3.5-Inch #2 Phillips and #2 Square bits to easily access hard to reach fasteners. Compact, modular storage system is compatible with MODbox™ and stackable with other cases of similar design. Set includes 3-Inch bit extension with strong magnet to keep bits in place. Variety of Phillips, Slotted, Square and TORX® bits to drive the most common fasteners on the job. 1/4-Inch and 5/16-Inch magnetic power nut drivers.