I read on my trusty Zinn Road Bike second edition book, that if your brake pads are not centered there are a couple of ways to center the brake pads with the wheel, brute force or a setscrew, I see the set screw on top of my tecktro brakes its on the right top side opposite the cable side. Now the book says either 3mm or 2mm set screws, my allen key tool only has 3 mm and it clearly doesn't fit, (smaller hex size) So my question is where can I find just a 2mm hex key? I live next to walmart, hopefully they have it I also live near home depot. All I want to buy is 1, 2mm hex key not a bundle. How much does the hex key cost anyone know? And Screw Tecktro and their 2mm B.S., they copied campy style they should have followed shimanos 3mm specifics.