Apex Torq-Set ® Screwdriver Bits from Apex Fastener Tools are designed with a cruciform screw drive used in torque-sensitive applications. The Torq-Set ® head on the Apex Torq-Set ® Screwdriver Bits is similar in appearance the Phillips drive in that it has a cross with 4 arms. In the heads of Torq-Set ® Screwdriver Bits, the arms of the cross are offset from each other so they do not align to form intersecting slots across the top of the head, and because of this, a Phillips or Flat-Head screwdriver will not fit the head. Apex Torq-Set ® Screwdriver Bits from Apex Fastener Tools are manufactured to the tightest tolerances in the industry and all bits from Apex Fastener Tools meet the most stringent government and military specifications.