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I have this set and attempted extraction on two seperat occasions and found them useless so far.
I highly recommend. Gave them to my dad for Father's Day and he has used them several times already. I used a drill that had too much power so I accidentally stripped the top of the screw with these things. Nice thing was that I just found another drill with more variable speed and used the larger bit and it worked perfectly.
For extracting bolts spiral or straight flute extractors are better. Overall, these work best for stripped phillips head screws, or small screws.
STUPID. Should be a way to reset your order amount. Never got it. Order was too confusing wanted one got two, no way to adjust amount.stupid system.
This set allows you to extract different sized screws. This thing is a must have for all households. Especially those with non adjustable torque settings on their screw guns at home.
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