Security screw Bit type needed

Most reputable tool dealers (Snap-On, Mac etc) can sell you most any type bit. What does the screw in question look like? Is it a Torx with center post?

No, not torx like headlite screws on auto. Hard for me to describe, but the screws have a center sorta like torx but with 3 arms slightly spriraling to the outside of screw. Mac

Do you mean sorta like a philips head, but with only three wings instead of four and they appear to be slightly angled? If so, it's called a tri-wing and is available in many places such as...

I have not bought from any of those companies, just found them through a goog search.

I can find a good assortment of security tool bits at the local flea market. I bought two sets, because the bits have a tendency to disappear. :(

Thanks, Think I will order the set fm MCM online. Mac

For some reason it's listing at $14.95 at their web site even though it's always featured at $8.99 in every flyer. To get the lower price you may have to mention source code 5A110 and their "Fall Into Savings" catalog for Sept. 12 - Oct. 28 and phone them at 1-800-543-4330.