I bought a 3/4" dia x 3 foot long white Delrin rod from Griangers last Friday for $7.50 after seeing the start of this thread.
I just started using a CA finish and very quickly recognized the need for these.
I finally got to use that scraper that came in my original tool kit that I'd never used before. It's a scraper with the tip shaped like this; /\ leaving a 60 degree cut on both sides.
I drilled a hole and put the delrin blank on my pen mandrel then just cut right in the middle of a 1.25" long blank, I cut right down to the mandrel with the scraper, parting off the pieces and leaving a nice 60 degree on both pieces. It took about 20 minutes to make these, including the drive over to Graingers.:biggrin: