drawtube and "wrench" (the knob with friction tube and drive pins) for hardinge 
dividing heads.  2 styles, one has holes for a pin spanner around the periphery.
Note that the flange on the threaded draw tube is releived a couple thousandths
around the outside.  It bears on the thin shiny section closer to the friction 
tube.  alos, the entry for the friciton tube into the end of hte draw tube is
is tapered very slightly.  Ground on the later tube with peripheral spanner holes.
Turned on the other.