So, I'm a noob to Porsches. I've primarily worked on muscle cars since I was 16 so my arsenal of metric tools is laughable at best. I need to change the parking brake pads on my 86 M491 but I don't have the right size allen wrench. Does anyone know what size it is? See pictures so you get an idea of which calipers I have.

Thanks in advance.

 

They are 10mm

 

And make sure you use a quality bit.