You may mean a Torx screw - like the one on the left of this picture...
http://www.bosch-do-it.com.au/mam/bosch-pt-centralpool/diy/diyknowledge/lexicon/bit1.jpeg
You can buy individual drivers but a better approach is to but a set of security drivers and a driving handle.
All good hardware, tool and DIY stores should be able to supply what you need - or go to Amazon and search for Torx Driver - or ask a neighbour...
Peccavi, August 2009
