Material: Chrome Vanadium Steel Design: Side cutout to prevent damage to wires, Perfect for removing and installing oxygen sensor. Performance: The heat-treated chrome vanadium steel construction and corrosion-resistant black phosphate finish ensure that the oxygen sensor socket can be used repeatedly without deformation and corrosion, greatly extending the service life of the socket. Package Included:2Pcs Oxygen Sensor Oxygen Sensor Wrench Removal Tool(If there are any problems with the product, please send us pictures.Tell us more details about this problem.) Thank you so much for your purchasing from our store.Any question ,please feel free to contact us., Manufacturer: CHUOZI