Right tool???

I am replacing the front hubs/wheel bearings on a 2000 cirrus...can any one tell me what size wrench I need for the star type bolts(3) that hold the hub inplace, or the proper name for that style,Thanks

And the answer is....I used an 11 mm Splined Socket.....worked well, though be sure you are on it square, I did round off one, and had to use a handydandy extraction tool I found at harbor frieght........