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ASVAB · Hand Tools

What is the correct use of a Phillips screwdriver versus a flathead (slotted) screwdriver?

Correct answer

A Phillips screwdriver fits cross-shaped screw heads; a flathead fits single-slot screw heads

  1. A They are interchangeable for all screws
  2. B A Phillips screwdriver fits cross-shaped screw heads; a flathead fits single-slot screw heads
  3. C A flathead is only for Phillips screws
  4. D Both are used to drill holes

Why this is the answer

A Phillips screwdriver has a cross- or X-shaped tip that fits the cross-shaped recess in Phillips screws, providing better grip and less slipping. A flathead (slotted) screwdriver has a single flat blade that fits the single straight slot in slotted screws. Using the wrong type — for example, a flathead in a Phillips screw — can strip the screw head or slip and cause injury. Matching the screwdriver tip to the screw head is basic tool knowledge. There are other tip types too (Torx, square/Robertson), each designed for a specific fastener.
Source: ASVAB SI, Screwdrivers

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