Gunsmithing screwdrivers: parallel faces, don't cam out and damage fastener.
Interesting discussion on B4633 JIS Phillips screwdrivers: Is there such a thing? Did B4633 even govern such a tool?
I dunno. Like Wera Kraftform Lasertip Phillips, though. Resists cam out.
![](https://cimg3.ibsrv.net/gimg/bikeforums.net-vbulletin/566x205/wera_kraftform_lasertip_54a55533ca1cadf42850a4fdf5fe41ae85ff7f3c.png)
Pretty much ancient history for bikes, I guess. On to Torx vs TorxPlus!