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From http://www.finehomebuilding.com/2015/09/16/what-is-the-difference-screw-bits-phillips-vs-pozidriv http://www.finehomebuilding.com/2015/09/16/what-is-the-di

by jonahx 8y ago

From http://www.finehomebuilding.com/2015/09/16/what-is-the-difference-screw-bits-phillips-vs-pozidriv http://www.finehomebuilding.com/2015/09/16/what-is-the-diffe...: "A Phillips bit fits in a Pozidriv screw head, but it will most likely cam out before the fastener is fully tight. This can damage the fastener and is why that cup hinge loosens up so quickly when a Phillips bit is used. A Pozidriv bit does not fit in a Phillips screw."

Doxin 8y ago
> A Pozidriv bit does not fit in a Phillips screw[citation needed] A Pozidriv bit fits in a philips juuuust well enough for you to not notice it's the wrong bit.
- freehunter 8y ago
  Yeah, I don't think "that's not phillips, that's pozidrive" is a good excuse. If they're that close, then pozidrive is just a non-standardard-complying phillips bit. It's the IE6 of screw heads, and the confusion is all their own fault.
  - nemetroid 8y ago
    The Phillips is the IE6 of screw heads. Pozidriv is an improved version which has long since replaced Phillips in Europe. I was unaware that Phillips screw heads were still common in the US until reading this thread.
    - freehunter 8y ago
      It seems Phillips is just an outdated but standards-complying head. No one wants to use it because there are better tools for the job these days, but it did serve its purpose once. Whereas Pozidrive just duct-taped a few updates to the old standard and decided to call it good rather than fixing the actual problems. There's no reason to have kept the same form-factor for the two varieties, it just leads to unnecessary confusion. The fact that you can plug an incorrect driver into it is, by definition, broken. Like how USB and Ethernet jacks are the same size, so you can plug your USB stick into Ethernet (which luckily does nothing harmful) but you can't plug Ethernet into USB. If you're going to update an old standard and that requires an incompatibility with the old standard, you should come up with an entirely new form factor to ensure people won't mistakenly use the old connector with the new technology. Though to be honest here in the US I've never seen Pozidrive and I just checked, I have zero drivers for a Pozidrive screw. Phillips really is just that awful all by itself.
  - Doxin 8y ago
    It's not like pozidriv screws are unmarked. And in any case these days if you buy 200 screws you get a bit thrown in for free at most places. 100% correct fit all of the time.

by jonahx 8y ago

Doxin 8y ago

> A Pozidriv bit does not fit in a Phillips screw[citation needed] A Pozidriv bit fits in a philips juuuust well enough for you to not notice it's the wrong bit.

freehunter 8y ago
Yeah, I don't think "that's not phillips, that's pozidrive" is a good excuse. If they're that close, then pozidrive is just a non-standardard-complying phillips bit. It's the IE6 of screw heads, and the confusion is all their own fault.
- nemetroid 8y ago
  The Phillips is the IE6 of screw heads. Pozidriv is an improved version which has long since replaced Phillips in Europe. I was unaware that Phillips screw heads were still common in the US until reading this thread.
  - freehunter 8y ago
    It seems Phillips is just an outdated but standards-complying head. No one wants to use it because there are better tools for the job these days, but it did serve its purpose once. Whereas Pozidrive just duct-taped a few updates to the old standard and decided to call it good rather than fixing the actual problems. There's no reason to have kept the same form-factor for the two varieties, it just leads to unnecessary confusion. The fact that you can plug an incorrect driver into it is, by definition, broken. Like how USB and Ethernet jacks are the same size, so you can plug your USB stick into Ethernet (which luckily does nothing harmful) but you can't plug Ethernet into USB. If you're going to update an old standard and that requires an incompatibility with the old standard, you should come up with an entirely new form factor to ensure people won't mistakenly use the old connector with the new technology. Though to be honest here in the US I've never seen Pozidrive and I just checked, I have zero drivers for a Pozidrive screw. Phillips really is just that awful all by itself.
- Doxin 8y ago
  It's not like pozidriv screws are unmarked. And in any case these days if you buy 200 screws you get a bit thrown in for free at most places. 100% correct fit all of the time.