Microtech screwdriver bit
Screwdriver bit for unscrewing a proprietary screw developed by Microtech (i believe) I don't know a lot about who produce the screw, it looks like a “snake eyes” type, but with one more pin.
This type of screws can be found mainly on french intercoms.
In France it's a commonly used screwhead to avoid tampering, and due to the difficulty to find the screwdriver bit i did this 3D model.
The hex is 10mm and pins are 1.45mm