With the exception of the tip, made of steel and tempered to make it hard, all the parts that make up the extractor screw are made of A303 stainless steel and have a special 10-year Sloting Plus guarantee against breakage or manufacturing defects.any of its parts.Excluded from this guarantee is the 1.9 mm point, marine oxidation, wear and tear from habitual use and any part that shows bumps, scratches or signs of manipulation inherent to its correct and habitual use.