"Leon" wrote in message
...

I have seen them. I believe that they are regular square drive
rejects. They were double stamped and the screw turned slightly on the
second stamp.

They are actually Canadian made by a GRK with a "torx" drive head
(http://www.grkfasteners.com/). We've been using them for years since
discovering them at the Homebuilders show back in the late 90s. In
Houston, Circle Jerk errr, Circle Saw is the only retail source we've
been able to find for them though, ironically enough, I've had no
problem getting them at small town "Do-It-Best" Lumber and Hardware
centers.
They are an extremely tough (hardened) screw with good corrosion
resistance. I can count on one hand the number of heads I have snapped
over the last eight or nine years. We hang a lot of cabinets with them
but like them especially when there are framing members to add and no
room for a nailer.
And, I do believe McFeeley's has started carrying them. Locally
they run around $6/lb +/- .

--
"New Wave" Dave In Houston