Different sizes - There is a total of 6 extractors of different sizes for diameter screws. Steel tool extractors have a spiral groove for left-handed for extra gripping. Aggressive left (extractors) and rightd (drill bit) spiral groove design for extra gripping power. Design concept - This screw extractor is subjected to a rigorous process, surface polishing , High hardness, high torque. This set is designed to remove screws, bolts, fasteners, metal water valve and damaged, rusty or bare water tube, etc. High quality - Adopt high quality GCR15 Steel manufacturing tool that could drill on most screws. Have a long life. Few bits can also be used to drill holes on wood, metal, plastic, brick and wall, etc. and mechanical screws as well as pH, flat, hex or painted on the screws and applied to maintain the household, the office, and so on. Easy to use - Drill a hole in the center of the First broken with a suitable drill, then use a suitable extractor to remove the screws. Diameters of the forests and the recommended extraction diameters of the broken screws are engraved on the box good notes - you can use with a tap handle that hold the extractor firmly; For the large extractor, you can use a wheel wrench. You can use a wrench to hold the extractor firmly when you remove the screw. Near electric tools, wear glasses and protective clothing. Features: Material: Steel Color: like the image Packing: Plastic box Size: like the image Package Included: 1 x 6pcs / Vis extractor set < / p>