2-pk 12pc 50mm Double Ended Combination Screwdriver Bits Flat Philip Pozi 111702

This screwdriver bit set is only suitable for manual job, not for Electrical Drills or Electrical Screwdriver. 2"/50mm length, 1/4"(6mm) shank. Myself used 1 bit for 1week job, nothing happen to the tip of the bit, very powerful.