Features Clear Scale: The metal screw extractor has high visibility laser etched scales for quick user identification and access. Chrome Molybdenum Steel: The screw extractor is made of high hardness chromium molybdenum steel, which is wear resistant, non deformable and durable. With Hex Head: The screw extractor has a hex head designed primarily for applying maximum torsion using sockets and wrenches. Left Spiral Design: The screw extractor's left screw thread design provides extra gripping power and faster threading speed, making your work faster and easier. Storage Box: The screw extractor set comes with a plastic case for storage, which is easy for you to access and not easy to lose. Specification: Item Type: Screw Extractor Material: Chromium Molybdenum Steel Package List:25 x Screw Extractor 1 x Conversion Rod1 x Socket1 x Storage Box Package List 25 x Screw Extractor 1 x Conversion Rod 1 x Socket 1 x Storage Box