2mm flat end hex driver for use with OpenBeam.
Notice that lots of projects are starting to use more metric hardware? Even in the USA (one of the staunch metric hold-outs), projects like Makerbot are using metric hardware in their designs. Look, we're not here to debate which is the better engineering unit (coughthousandthscough), but to show off a new tool!
This will be the most often-used driver when building with OpenBeam, so it makes sense to splurge a little bit and get a really comfortable tool.