Mediabridge F-Pin Grounding Block - Includes 2 Mounting Screws Intended to ground incoming F-pin cables to your TV, VCR, cable box, cable modem, off-air antenna and more, while preventing a buildup of static electricity. It can also be used to protect your electronics from damaging lightning strikes and power surges. Each end of the grounding block is specifically made to fit into a standard male F-pin coax connector. A weather-resistant metal build is ideal for organizing and maintaining your audio/video network with quick access. Includes 2 screws for easy installation. The mounting screws are even individually wrapped in a small plastic bag to protect the grounding block from scratches. Mediabridge provides a Limited 1-year warranty for this product and live US-based customer support , should you have any questions about the product.