In message , Brian Gaff
wrote
I blame the screwdriver makers myself. I actually never saw a socket head or
posi screw till I was at least 25.. The correct screwdriver for the slot
used to help a lot though.

Slotted screws are not easy to use when 'on site' you are using an
electric screwdriver/drill to insert them.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk