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I wonder on what kinds of things the second, third and fourth bits from the left can work?

What kinds of things can the fifth and sixth bits from the left work?

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Picture not really clear, but I will take a shot. From left to right:

  1. socket adapter
  2. looks like torx bit - specialty (newer version of Phillips)
  3. looks like torx bit - specialty
  4. looks like torx bit - specialty
  5. #2 Pozidriv - deck screws
  6. #1 Pozidriv - smaller screws (curtain rods, cabinets)
  7. #2 Phillips - Most common
  8. #1 Phillips - Most common
  9. #2 slotted - most common
  10. #1 slotted - smaller slotted screws
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    1 is likely an adapter for using sockets with the screwdriver.
    – BMitch
    Commented Aug 10, 2012 at 0:49
  • Yes, BMitch is right. 1 is ADP
    – Tim
    Commented Aug 10, 2012 at 1:04
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    staticsan is correct about #5 and 6= pozidriv
    – DA01
    Commented Aug 10, 2012 at 3:03
  • Does anyone actually own/use pozidriv drivers? I've never seen them at any of the bigbox stores. I have an entire klein driver set and they don't seem to offer them either..
    – Steven
    Commented Aug 10, 2012 at 13:26
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    Here in the UK most of our regular woodscrews seem to be pozidrv (specificaly PZ2).
    – Peter Green
    Commented Nov 22, 2016 at 2:23
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The second, third and fourth bits look like Torx which looks like a six-pointed star. They are not the same as a simple Philips.

The fifth and sixth are Pozidriv which are largely compatible with Philips but they really shouldn't be.

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    Using the right bit between Pozidriv and Philips makes a huge difference - suddenly the bits no longer cam-out as badly, and for Pozidriv hardly at all (this applies both ways - use the right bit for the screw).
    – Eli Iser
    Commented Aug 12, 2012 at 13:36
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The second, third and fourth bits look like are commonly used in home appliances such as notebooks, televisions, set top boxes, Xbox, apple computers/books/iPod/iPhone/ PlayStation, but also used in Cars/Boats/ Hobby toys; in various sizes. As described in the wiki they are used for precise torque tightening in devices that require precise adjustments, for example the CD-ROM tray in an Xbox.

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Because they used it inside the devices they might as well use the same screws in the covers to reduce cost of other types of screws. When they started using them some time back, people thought they were there to stop them from easily getting in and tinkering with the electronics.

But as you have experienced your self, you got all these interchangable bits in a standard screwdriver set now a days for a few bucks.

Like @staticsan mentions the Pozidriv is an improved version of the philips screwdriver.

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