The Rectorseal Novent Universal Locking/Unlocking Refrigerant Key 86698 NV-Multikey is a versatile tool designed for use in heating, cooling, and air systems. Made in China by the trusted brand Rectorseal Novent, this key provides a convenient solution for locking and unlocking refrigerant connections. With its multi-key functionality, users can easily work with various systems to ensure smooth operation and efficiency. Ideal for professionals in the HVAC industry, this product offers reliability and convenience for tackling maintenance and repair tasks.