For PCB isolation/drilling/routing, get bits from LPKF Store (pricey) or Precise Bits (more reasonably priced).
Discount re-sharpened bits: Drill Bit City
Another interesting site is Think and Tinker.
Router bits
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For PCB isolation/drilling/routing, get bits from LPKF Store (pricey) or Precise Bits (more reasonably priced).
Discount re-sharpened bits: Drill Bit City
Another interesting site is Think and Tinker.