Threaded Drivers?

[gearfreak]

I think the Selenium female threaded one is plastic, it's a POS
Suspect that is where the confusion is. AFAIK the male is metal

I concur one is and one is not, forget which is which though.

The ones I bought to mate K-55 w/511b were plastic if that helps. Had to drill (2) mounting holes, no big deal.

The metal ones, may not even have been aluminum. I'd thought potmetal when I first unpacked them.