This BNC connector keystone coupler provides a commercial grade installation for home theater, CCTV security surveillance camera or high-end video applications. COUPLER TYPE - Provides a sturdy Female to Female in-line BNC connector. QUICK SNAP - Quickly snaps into installation and easily fits standard keystone wall plate, patch panel or surface box; Compatible with nearly all keystone style wall plates. TWIST-ON FEATURE - When installing the cables behind the wall, aim the raised spot on the connector, insert the BNC cable to the connector, and twist the end of cable so the connector is locked securely to your BNC cable behind the wall. WIDE COMPATIBILITY - Reusable keystone jack design allows for easy disconnection and relocation when upgrading or redecorating; fits most standard keystone wall plates, surface mount box or patch panel. Material: Zinc alloy + plastic Color: As shown in photo Package Contents: 10 x BNC Keystone Jack or 5 x BNC Keystone Jack Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.