70242 is a #2, 2inch, Phillips, TerminatorBlue impact bit (15 pack). It is impact rated for power tools and rigorously heat-treated to produce a bit lasting 120 times the service life compared to standard bits. Its specially designed torsion zone absorbs 30 times the impact energy compared to standard bits, allowing a maximum torsion flex that goes unmatched. With TerminatorBlue Impact bit user get the tightest-fit precision-machined square driver tips from the company that sets the standard for precision. Wiha's exact-fit square tips eliminate excessive bit-wobble for increased driver accuracy. The result is a highly stable engagement with the screw head and a reduction in fastener cam-out that can lead to injury or damage to finished materials.