3-Two Piece 7MM Privacy, or Passage Steel Doorknob Spindles for knob sets that use this type of broached, swivel split spindle. Length-about 94mm when tightened together-NOS. I think they were made by K S Schafer in West Germany.  New, but out of package and showing some corrosion from sitting around for years. They should be fully functional though and the corrosion is not visible when installed.