A Torx screw head
Split by <a href="//commons.wikimedia.org/wiki/User:Stannered" title="User:Stannered">Stannered</a>
2007-04-21
<a href="//commons.wikimedia.org/wiki/File:Screw_drive_types2.svg" title="File:Screw drive types2.svg">Screw drive types2.svg</a>