[TowerTalk] Drill bits

[K7LXC at aol.com]

Here's my 2 cents worth. I'd use a small bit for a  pilot hole and then use 
a step-drill (e.g. Unibit) to get it to the desired  size. Those 
step-drills will enlarge it to a nearly perfect round hole in short  order. 
 
    What are you building that you need 140 holes for?  Sounds kind of 
ambitious - hi. 
 
Cheers,
Steve    K7LXC
TOWER TECH