Features Chrome Molybdenum Steel The screwdriver is made of high hardness chrome molybdenum steel, which is wear-resistant, non-deformable and durable. Left Spiral Design The left thread design of the screw extractor provides extra gripping power and faster threading speed, making your work faster and easier. WITH HEX HEAD The screw extractor features a hex head designed primarily for applying maximum torsion with sockets and wrenches. CLEAR SCALE The metal screw extractor features highly visible, laser-etched scales for quick identification and user access. Storage Box The screwdriver set comes with a plastic case for storage, which is easy to access and not easy to lost. Specification: Item Type:Screwdriver Material: chrome molybdenum steel. Package list: 25 x screw extractors. 1 x conversion rod. 1 x socket. 1 x storage box Package List 25 x Screw Extractor 1 x Conversion Rod 1 x Socket 1 x Storage Box