Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Do not waste your money on this set! After an hour I had worn the smallest drill bit in the set down to a nub trying to drill through a small transmission bolt on my Pontiac Sunfire. I did get the screw extracted, however, the set was worthless by the time I got the screw out. Also, the extractors are weak. One will need a small torch to heat up the metal to loosen screws and bolts to keep from snapping the extractors.
Negative