Tool to unscrew volume/tone knobs?

Want to unscrew the volume/tone knobs on my Tele Affinity. Tool that came for the bridge is too small, think it might be called an Allen bit or that's what I need. That's what I came up with looking at Stew Mac. If you know the size and where I could buy the tool online I'd like to know. Can't wait to put some rounded knobs on the sucker.

Probably easiest to just go to a Hardware Store or Sears, and buy some small metric allen wrenches.