How It Works: This BNC twist-on (or screw-on) connector for RG59 coax connects BNC audio/video cables and cords for 50-ohm and 75-ohm cables. Simple Setup: The screw-style coupler streamlines cable management, providing a solid connection that is simple to install by twisting on the connector—no additional tools required. Compatible With: SDI, HD-SDI, TVI, CCTV, networking, internet, intranet, security camera systems, alarms, monitors, surveillance, audio and video cables, radio and television systems, and many other technologies. Solid Construction: These connectors are precision machined from corrosion-protected solid metals to provide a secure connection that passes signals smoothly, creating clear picture, sound, data, and communications. Smooth Connection: Solid internal materials and construction eliminate interference while providing clear audio, video, data, and other signals.