Unknown tools nº7 - Screw extractor set

Unknown tools nº7 - Screw extractor set Screw Extractor Set In the back of the box indicates the tolerable thickness for each extractor The front is conical... we introduce into the drilled hole and turn left two tests The screw will come out harshly in this way The hole should be at the center of the screw The hole has to be 50% of the thickness of the screw If we make too big a hole... Note: small extractors break easily