A slot headed, threaded cast FeCrCo magnet - a great was to build up Wide range humbuckers with truly magnetic poles pieces.

Threaded to the standard USA thread used on the originals, and whilst therese aren't CuNiFe, they're about as close as your going to get in the modern day. A great part for historically correct builds.

Please note - these are unplated, and are a similar colour to Alnico poles.