Material: high quality chrome vanadium steel This principle is the extension of the external pulling tool. The principle of this tool is to extend the external pull, the specifications of this tool cover almost all motorcycle bearings, thanks, if it doesn't work for you, don't worry, please return it. Put the tool head into the inner bearing ring, then screw into the shaft.The tool head to open, and hook the inner ring of the bearing. Then turn the shaft. This bearing disassembly is made up of chrome-vanadium components to secure a tool Powerful durable that will meet the repair needs of your motorcycle for many years to come. Note: Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Delivery quantity: 12 pieces