Chainsaw Repair

What are they called and where would I find them?

OK I am to the point of replacing ignation switch in 02 sunfire and ran into a stumbling block. The 02 bottom panel bolts cant be flipped over to use (like in a video of a 96 model) to remove the very tiny 6 star shaped 2 bolts holding the ign switch on.

What size is these special little 6 sided star type bolt heads and tool needed? It would be a female tool to remove. Nothing I have comes close.

I had a 4mm regular socket (just to try and gauge size)  and it even fits over the 6 sided star. So it is tiny tiny tiny. 

Guessing called torx but it is the opposite of every torx tool and socket I have. hmmmmm

E4 star socket. Took 4 different places but found it. Like inverted torx star.

They are a type of "tamper proof " fastener .McMaster Carr probabley has them .

I have a set of tamper proof tools  at work we use to work on safety lock out machine gates that contains a few plus about 25-30 other popular sizes .Made by Wiha of Germany.

I checked it out at work but I won't post anything through the companys' internet system .They call that thing an inverted torx .You can get a cheap set through flea bay for under 20 bucks or pay 150 plus for a Snap-On or Mac set .