Here you go, Jason. 1/8 inch roll pin by 1 1/4 inches. 1 inch too short and they don't catch as well in the grass/dirt to stop them, 1 1/2 inch roll pins bend or break more often. If you shoot around rocks you'll break off a side once in a while, just tap in a new pin. I drill them on the drill press, takes longer to find the right bit, for me, in my toolbox than to make one. They REALLY thump small game, too.R