Pen Blank Vise

I bought a Milescraft 1318 Drillmate https://www.milescraft.com/product/drillmate/, and wanted a better way of holding a pen blank (with a clamp) while I drilled it. Holding just the blank would make it harder to keep it perpendicular, as well as the drill hitting more of the work bench when it exits the blank. This is no way a replacement for a drill press and vise, or better methods, but it'll work in a pinch.