I have 108 3/4" carbon steel balls that have a C60 hardness that I need to drill on center. They have a "reflective finish" according to McMaster-Carr which might mean they are chromed (I haven't bought them yet). Assuming they are chromed and I cannot anneal them how much of a PITA is it going to be to drill these guys? Hole can/should be pretty small but not needle sized. say anywhere from .08" to .25" Thanks for the help!