Smart Keeper Lock Key Basic (required for removal): must be the same color- Sold Separately or as a bundle of 6 locks and 1 key Easy to Use: It can be installed by hand. Various Patterns: Multiple color patterns are available. All Purpose Key: A common key (must be the same color) can be used to unlock 10 different products within the Essential series. Enhanced Security: Four security holes for secure fit. This is a physical cybersecurity device that prevents unauthorized connection to an unused USB port. Key NOT included. Requires one Smart Keeper Lock Key Basic (Sold separately) for removal. Key and locks must be the same color for removal of the lock.