Dillon Precision Powder Bar Knob

This powder knob fits a 7/16 bolt face with a snug fit. It has markings showing which way to turn for more or less powder. Also, there are markings that align with the knurling on the knob at every 1/8th of a turn for precise adjustments. I printed at a 20% infill with 3 walls and no supports, but print however you want.