A simple graphiter for your personal caliber of choice. You can put 3 of your most common brushes or print more and add more brushes , its up to you. Becuase different brands of brushes dont use the same thread the 3 holes are underdimension so just drill them for your thread and put them in , the hole in the center is for attaching the bottom to your reloading bench or some other place , made this one when my forster brake up but didnt want to make a straight copy of that one .