411/412 Rear Brake Drums

[chris67bug]

Hi folks,

I am presently trying to move a 412 that has been lying for years and the rear drums are seized solid. Does anyone know the size of the allen key size bolts which hold the drum to the hub? Thought I would have a go at removing the drums with a puller but the bolts would of course need removed first. The car is some distance from me so cant nip out and check!

Thanks

Chris