Chrome wound steel. Ball end only. Can be removed.
The original Jargar string.
All strings are ball end, full size, medium tension unless specified.
Good sound, but breaks miles too easily.
Pros: The sound great; there's no shrill squeak
Cons: The break awful easily! Besides the obvious, I'm also not keen on fiddle strings breaking because of the way it puts a sudden strain on the fiddle. I got very little use out of the last E string in particular, it had only a few hours of playing done.
Other: I'd change to a more durable alternative if it could produce the same sound.