Its a 15 mm wrench so he can change tubes/fix flats, chain tensioning, and pedal adjustments. Also makes a great beer opener if that's your thing. Post #8. We drill holes in ours and attach with M5's. Long if we can find 'em. Standard fixie fair in the tundra where we live.

You can order a wide array of colored cable housing from Lickbike. Good price as well.

http://www.lickbike.com/productpage....=%271522-01%27

Works great w/ non-indexed systems. Fine for brake cable as well.

Two "brakes" make sense with mustache bars, especially with the hand positions.