Sounds like you have some Robertson screws. Must have gotten them from a
Canadian friend as we don't normally allow Americans to use them ) ( long
bitter patent war).

Seriously these type of screws can be removed using a screw extractor. The
extractor looks like a drill bit but the spiral is in the opposite
direction. When you turn this extractor counterclockwise the spiral digs
into the screw head and the screw comes out naturally. This toy has saved
many a project, There are typically 3 sizes of these extractors. They are
hardened steel . Ask santa to bring you a kit of 3. The kit should set you
back roughly $18 us


"Richcosta" wrote in message
...
Hi,

Any creative tips for removing screws whose heads have nothing to
catch? These are neither regular or Phillips Head screws. They have
a special bit, kind of in the shape of a square. Anyway, the inside
of the head is now a round, smooth circle.

Any ideas for removing them would be appreciated.

Thanks in advance.