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.


Pretty much ancient history for bikes, I guess. On to Torx vs TorxPlus!