Instead of purchasing a new sert of drivers which included smaller than size 10 bits, i decided to adapt the screws to fit a regular flat head screwdriver.
Using my trusty dremel and a cutoff disk, i cut a slit in each screw... due to their hardness, i ended up going though 2 and a half disks cutting through all the screws on 2 harddrives.
after than i was just a matter of opening the screws as if the were normal flat head screws.
Boom. Harddives open.
Hopefully this helps someone.