The square shape of these extractors gives the tools the ability to remove broken bolts, screws and pipes with minimum deformation of the borken part. The forged construction imparts an extra degree of toughness, which reduces extractor breakage. To remove the borken threaded part: Drill a hole in th end of the borken part (left had sipral heavy duty drills are recommended for this drilling operation), insert extractor and turn clockwise using a wrench on the exposed end of the extractor. The borken part should unscrew without damage to threads. These forged extractors will not chew up or expand the object being removed.