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Finland, Helsinki
1 Level
38 Review
0 Karma

Review on Double Ended Cobalt Drill Bits by Danny Black

Revainrating 3 out of 5

Ineffective Drill Bits for Professionals

As a result of using this product, I found that it broke so easily even at moderate pressure. These bits left rough and jagged edges on the metal making it hard to get a professional finish..

Pros
  • Unlikely to break in storage
Cons
  • Not efficient and reliable for industrial and scientific use.