A modern-day bank robber who packs a DeWalt 20V Max Cordless instead of a Glock, and bores open vault-doors using 1/2" cobalt and titanium twist-bits instead of dynamite.
Since wielding a power tool is usually less intimidating or "convincing" than brandishing a loaded firearm, John Drillinger usually works at night when da bank is closed, and thus he doesn't have to rely on da compliance of others to gain access to da desired loot.