Craftsman 12 point 10mm fit on mine.

Assuming you get them out, a tap to clean/re-cut the threads is probably a good idea to enable proper tightening torque on re-install. The new shocks should come with replacement bolts.

If you're unsure of the tap size, the bolt-matching templates at Lowe's/HD are useful. Diameter and coarse/fine thread need to match.