• 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 3-1/2 in #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 its similar design Set includes 3 in 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 in and 5/16 in magnetic power nut drivers

Klein tools designed a set of ProFlex torsion zone impact driver bits for the professional tradesman and do-it-yourself enthusiasts. All of the bits are made of high impact-rated S2 steel and feature an optimized torsion zone that absorbs impact forces to increase the lifetime of the bit. The 3 in bit holder and 1/4 in and 5/16 in nut drivers have strong magnets to easily hold bits and fasteners in place. Minimal chamfering on the nut drivers hex pockets increases surface contact between the nut and driver for better performance. All 40 pieces fit in a durable, impact-resistant case featuring steel hinges, a stay-shut latch and modular stackability with other cases of similar design.