2mm ball tip 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 hold-outs against metric), 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 great tool!
Unlike the regular 2mm hex driver, this one contains a ball-tip that that allows for up to 25 deg deflection off the screw's axis for driving. This makes the ball driver very useful for driving screws in tight spaces. Note: The drawback is that a ball end driver can't transmit as much torque, and will wear out faster. For final tightening of a screw, it is advisable to use the short end of a hex key. But even with these shortcomings, anybody who has used a ball-tip hex-driver will recognize it's great usefulness!