I would like to buy drill bits, that I can use to clean carburetor passages. I now use tip cleaners, for acetelene torches, and will probably, continue to use them, most of the time. sometimes it would be more efecient to use a small bit, to allow cleaner to seep in to corroded passages. I would like to buy drill bits smaller than 1/16 inch, which I could use with my fingers, or turn with a tap tool. Are these called wire guage bits, or something else? I remember the Boeing Co had some very small bits in their tool room, that had hex ends on them around 1/4 inch in size It looked like a hex button that one end was imbedded in. I hope some one can tell me! Thanks Ralph