Features Chromium Molybdenum Steel Material: The nut extractor is forged in one piece from chromium molybdenum steel, which is strong and durable and has high hardness. Electroplated Blackening Treatment: The surface of the nut extractor is electroplated blackening treatment, anti corrosion and rust resistant, for manual ratchet, impact wrench and pneumatic ratchet. Good Grip: The nut extractor provides maximum grip to easily remove damaged or rusted nuts, screws and bolts. Hex Screw Socket: This nut extractor kit has different sizes of extractors along with a hex screw socket to go with it. Applicable Scenarios: 3/8in nut extractor is perfect for daily furniture repair and office use, a good industrial and repair tool. Specification: Item Type: Nut Extractor Material: Chromium Molybdenum Steel Color: Black Nut Extractor Size: 1/4in, 8mm, 3/8in, 10mm, 11mm, 12mm, 1/2in, 13mm, 14mm, 16mm, 17mm, 11/16in, 19mm Use: For manual ratchets, impact wrenches and pneumatic ratchets. Package List: 13 x Nut Extractor 1 x Hex Screw Socket 1 x Storage Box Package List 13 x Nut Extractor 1 x Hex Screw Socket 1 x Storage Box