I'm trying to fit the transponder that came with my new PPP ECU and the hex bolts holding the steel casing together that shields the transponder only seem to tighten with a standard hex/allen bit. If I try to undo them the hex bit just twists out so they are obviously tamper proof hex bolts.

Anyone know which bits undo these screws?

 

A sharp drill bit.

 

I actually used a dremel with a metal cutting disk and cut slots in the bolt heads, then removed with a screw driver...dead easy!