Always Look At Your Collection of Tools First

I had some Sherline collets that hold a 1/8" shank endmill but I could not figure the drawbar that pulls it up into the mill.  So I thought I needed the 8mm WW collet drawbar and adapter. It arrived and was clearly the wrong part, intended to grab collets with external threads.

So i dug through my collection of drawbars for which I have never figured out a purpose and found one that pulls the collet into position and locks it down good and tight. Collets are also supposed to provide better concentricity than end mill holders. I am sure far better than the drill chuck i was using for the 3/16" endmill.  I have collets for 1/8", 3/16", and 1/4" shanks.