【Different Sizes】There are total 5 extractors in different sizes for diameter screws. The steel tool extractors have a left-handed spiral flute designed for extra gripping power. Aggressive left-handed (extractors) and right-handed (drill bits) spiral flute design for extra gripping power. 【Different Sizes】There are total 5 extractors in different sizes for diameter screws. The steel tool extractors have a left-handed spiral flute designed for extra gripping power. Aggressive left-handed (extractors) and right-handed (drill bits) spiral flute design for extra gripping power. 【Design Concept】This set is designed to remove damaged, rusted or stripped screws, bolts, fasteners, metal water tap and water tube, etc. 【High Quality】The drill bits are made of high speed steel for high hardness which can drill on most screws. The drill bits can also be used to drill holes on wood, metal, plastic, brick and wall, etc. 【Easy to Use】Drill a hole in the center of the broken screw first with a suitable drill bit, then use a suitable extractor to remove the screws. Drill bit diameters and recommended extraction diameters for broken screws are engraved on the case. Features: This set is designed to remove damaged, rusted, or stripped screws, bolts, and fasteners. The steel tool extractors have a left-handed spiral flute designed for extra gripping power. There are a total of 5 extractors in different sizes for diameter screws. Easy to use, first drill a hole in the center of the broken screw, then use a suitable extractor to remove the screw. You can use an adjustable wrench to hold the extractor firmly when removing the screw. Specifications: Material: GCR15 tool steel Suitable screws (diameter): Package includes: 5 x Extractors