Cut a slot in round stock

M3008 10mm Solid Carbide Slot Drill 8mm slot drill All you need is a drill press, a HSS step drill bit, a file I Made an Easy Slot Cutting Template 8mm t slot nuts 8mm Diameter Throw Away Slot Drill 3 Flute HSS High Speed Steel 8% Coblat TiAlN Coated 8mm Diameter Throw Away Slot Drill 3 Flute HSS High Speed Steel 8%

starbatch slot Has anyone had luck making a slot in a commercial PCB by getting them to drill closely drilled holes 8mm or so for the tabs of barrel jack