The wire I used is just leader wire with a plastic coating, used for making pike leaders.
American Fishing Wire Coated Leader Wire, Bulk 300 foot spool

Nightprowler had asked me about different wire and then told me what he was trying to do and I suggested the leader wire and he moded a ball head mold to start and sent me some, I powder painted them and cured them in the oven and they worked fine. He used the black colored leader wire - I wanted some horseheads and bkabina had tried using a small hand drill and he sent me one.

I used it and the same small drill bit on a dremel would work better, it DOES NOT create dust. Just pieces like flash which I save and put in my pot when I melt again.

For me I hate the idea of moding a mold but I'm gonna have to break down sooner or later and do it, if I get tired of the work arounds.