On Thu, 20 Dec 2007 13:18:57 -0800 (PST), Richcosta
wrote:

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.

Take a spare Robertson bit and shorten it by a small amount
leaving sharp corners. The bit is tapered so that it should also
be a slight bit larger and impossible to bottom out completely.

Next take your special made bit and attach it to a impact driver
http://en.wikipedia.org/wiki/Impact_driver