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Pros & Cons
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Drilling Strength
Customers generally praise the drilling strength of the Cobalt Left Hand Drill Bit Set, stating that they work well in various materials and last longer than regular drill bits. However, some mention that while these bits are stronger, they still require more time to drill through certain materials compared to other options.

Highlights
Quality
These are really good bits, drill through engine blocks easily.
These work great, definently cobalt, and with care, lasted through many holes drilled in 1/2inch plate steel.
While drilling through metal siding into a round pipe i broke several regular drill bits, after getting these bits i have only ... Read More
One didn't even start to drill much and it snapped.
Price
Had my doubts due to price but these things tore through a piece of hardened steel i've been trying to drill a hole through for... Read More
Shipping
Seems someone was a little rough on the product before it arrived possibly the delivery service.
Overview
- How are reviewers describing this item?
through, set, good, nice and regular. - Our engine has profiled the reviewer patterns and has determined that there is minimal deception involved.
- Our engine has discovered that over 90% high quality reviews are present.
- This product had a total of 470 reviews as of our last analysis date on Mar 15 2025.
Helpful InsightsBETA
Posted by a reviewer on Amazon
Seems someone was a little rough on the product before it arrived possibly the delivery service
Posted by a reviewer on Amazon
Case was banged up on the side a little bit
Posted by a reviewer on Amazon
Using regular bits it would have taken several new bits for a single hole
Posted by a reviewer on Amazon
With these you could probably drill ten holes before it was too dull
Posted by a reviewer on Amazon
Used 1 and some bits were dull and rest cut ok
Posted by a reviewer on Amazon
One didnt even start to drill much and it snapped
Posted by a reviewer on Amazon
Have to use it more to see how they work
Posted by a reviewer on Amazon
Tried other brands to no avail
Review Count History
Price History
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