Keystone Jacks are modular connectors designed to terminate and connect LAN cables within wall plates, patch panels, and surface mount boxes. They play a vital role in structured cabling infrastructure by providing a professional and efficient method for managing network connections. Available in various categories such as Cat5e, Cat6, and Cat6A, keystone jacks support high-performance networking while maintaining signal integrity and minimizing interference. Their standardized design ensures compatibility with a wide range of networking accessories and installation environments.