What is the smallest drill bit in your toolbox?

One millimeter? One tenth of a millimeter? How about three hundredths of a millimeter! The Sumitomo Carbide 30 microns drill is simply scary. No time for fake modesty: I certainly know how to handle small components, but my first encounter with the 30 u drill was heartbreaking. The tip snapped off before I had even had a chance to photograph it.  Luckily, we've ordered three... Andrew and Bobby went quiet (thinking 'lucky that wasn't me!') but Josh got revved up to red. Yes, $120 down the drain, but at the end of the day, you don't really know how to handle it unless you break it... At this stage we have no idea if drilling a micro hole in titanium is even possible.  Will keep you informed.

Photo: Sumitomo drill next to human hair, our in-house photo.