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Review on Cobalt Twist Drill Bits 5 2Mm by Devin Jirsa

Revainrating 1 out of 5

Not suitable for steel.

If you want to drill something harder than aluminum, don't waste your money. I pierced 2 drill bits per 1 hole in 1/8 gauge mild steel with coolant.

Pros
  • Reduced cost per hole
Cons
  • old