It is suitable for the modification and replacement of the valve inner nozzle and the vacuum tire nozzle lock nut. After the replacement, the locking force is greater and the air tightness is better. The unique sealing ring can not only improve the air tightness, but also prevent the nut from loosening and wheel hub damage. Portable multifunctional wrench. Can be used to install or remove Presta valve core, nut, extension rod. The lightweight nut is made of high-grade aluminum alloy. Which greatly reduces the impact on the wheel balance and enables the driver to obtain better competition results. Package Includes: 2x Nut, 2x Sealing ring, 1x Multi-function wrench. Note: When installing, first place the Sealing ring, and then tighten the nut..Items from Sheng Xinshun's shop