Get it here: http://amzn.to/1Fy6oE0
The Leatherman Mako TI is Leatherman's first attempt a a bike tool, and it's pretty good. Aside from being a bit clumsy to use, the Mako makes up for it by being super compact, lightweight, versatile, and capable of turning a 15mm bolt.

The only thing I would say is, you may have to put your foot on it to turn a really tight bolt, since the tool itself is short and narrow.