Larry,
Are you referring to a screw with a head for a Torx bit or driver? If so, what size Torx is it? I would suggest buying a 1/4" drive Torx socket of the correct size. With a socket, you can install it on an adapter for a battery powered driver, onto a 1/4" drive screwdriver handle or use with a ratchet.
You can get an entire set of 1/4" & 3/8" drive Torx sockets for $10 at Harbor Freight.