On Tue, 19 Aug 2008 23:47:10 +0100, wrote:

Yep but can no one tell what type of screw the bit (or screwdriver) is
for when it hasn't got PH or PZ markings?

The part and markings at 45deg to the X are a good clue.

On the screw head yes but not on the driver.

The best one is to line the bit and screw up and see if they stay in
line. This will confirm size and type more accurately.

True enough but you've looked at your screw and it has the X on the cross.
You have two screw drivers without PZ/PH markings. How do you know which
is the pozi one *without* checking the fit?

--
Cheers
Dave.