Flat tube - need help - Wheel lock pattern?
 

Hey guys.

Its finally came to the day I need to replace a tire on my Novara Buzz (pulled out a 3 inch nail..). As I'm (un)happily dismantling the screws and such, I notice that on the wheel lug pattern I don't have this tool.

I did search here, and googled, it appears I need a proper terminology before finding the exact thing.
I tried stuff like Novara lock pattern, bicycle wheel lock, bicycle wheel lug nut, hexa circle screw.. no dice.

I need help knowing the name, or whatever it is called. Apparently I have no method of removing the screw..

It's locked up with a pattern like this:
Crappy pictures, but hopefully you get the idea..

http://i42.tinypic.com/261yw6d.jpg
http://i39.tinypic.com/20f5gew.jpg
http://i39.tinypic.com/2vlmyko.jpg

Thanks in advance.

take it to the bike shop you got it from?

What about those shops that sells tools? I forgot the shop names thou.

Ya, figured it out. Thanks for tip guys. I don't have a bike shop because I bought the bike online through REI with no membership :(

For anyone in the future, apparently it's a #6 allen wrench:
http://i43.tinypic.com/280lfed.jpg

Don't ask me why, I have no clue why the design says otherwise. But it works.