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I do not believe that is the fault of the piece itself, but the simple nature of it being such a precise drill bit that you need to be very careful when using it
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Quick context: one needs to drill using the appropriate drill bit first, and then remove the screw using the matching extractor (e.g. for a screw with 2.5mm diameter, the #9 drill is to be used followed by the #9 extractor)
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I used my lightweight battery powered drill and then my heavy duty line powered drill capable of much greater torque.
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A gentle drill on low speed, followed by a reversing extractor (at a slightly larger size than what I'd just drilled) and the screw came right out.
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I need to get harder drill bits to cut through this
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What you want to do is get a set of cheap drill universe drill bits and use that
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you have to grind a hole in the screw w/o breaking the screw and burning up the bit/drill.
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Extractor kit came with correct drill bits
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They are not Cobalt and will be damaged when drilling into another screw.
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Every single drill I received had trouble cutting into a mild steel machine screw head
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i tried other youtube tips, uh no. got this kit and followed instructions... counter clockwise slow power drill, one to cut in to make the other tool grip, switch to other
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Used a metal drill bit (not part of this kit) to try and drill out the screw more and more but the drill bit broke too
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I was attempting to extract a snapped bolt from my bike and the drill bit (smallest one) broke after just making a dent in the bolt
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Just take your time and drill slow and deep.