Roger Mills wrote:
In an earlier contribution to this discussion,
Andy Champ wrote:

Roger Mills wrote:
Yes, but what happens when you try to *remove* a screw from wood
that's past its best? You have to push axially onto a screw with a
cross-head bit - with the result that the screw simply rotates but
doesn't actually come out. Whereas with a torx screw, you can rotate
it without pressing on it - so it comes out easily.

What's a rusty torx screw like to get out?

Andy

Not a problem - unless it shears off - but that could happen to *any* screw.

I was actually referring to the *wood* being past its best - rather than the
screw. If you can rotate a screw without pushing on it (which you *can* with
a torx screw), it will come out - even in slightly soggy wood. But with a
cross-head/pozi - which needs axial pressure for the driver to engage -
you've *no* chance.

It needs very little pressure on a PoziDriv screw if the head is
undamaged, the design is specifically aimed at minimising the chance
that the screwdriver will 'cam out' isn't it?

--
Chris Green