4 ms·

Cam-out seems like an ex post facto justification to me. Henry Ford would have picked Robertson if not for the licensing trouble. Robertson's lack of a cam-ou

• Ancapistani 6y ago
  Agreed, and that's what I meant by "almost always improperly used". Phillips is great for use in plastics in many cases, but they were popular long before that became an issue. Personally my drive of choice is Torx - they're six-sided so they're easier to align the driver, they have excellent torque transfer, they're hard to "wallow out", and the drivers are relatively inexpensive to manufacture. Beyond that, hex ("Allen") head are good for smaller fasteners where the "wings" on a Torx driver are so small they're fragile, Phillips is good for applications where you don't want it to be easy to over-torque, and plain old "flat head" is very well-suited for dirty environments where grease and debris may end up coating the head. I'd certainly not want Torx heads on the bolts under my Jeep, for instance, because they're a pain to clean out. I can clean out a flat head with the corner of the driver and be able to use it effectively, which is practical unique to that design and very important for those applications. I have nothing against Robertson. They're as good as anything for 90%+ of applications, it's just that they're uncommon enough where I am that it doesn't make sense to use them.