It's in a hardened steel albrecht chuck collar.
Can I slice the screw with a dremel cut off wheel?
The screw is black, material is unknown. Someone stuck a phillips head screw in the collar, it's supposed to be a slotted cheeshead machine screw. More than likely the collar is trashed. A new one costs only $30 luckily.
I can put it on a mill and drill right through it? Carbide bit?