Every connection adds a small amount of signal loss (roughly 0.1dB for a coupler). If your internet drops or TV signal flickers, you may need a Coaxial Amplifier to boost the strength.

: Available in lengths from 6 feet to 50 feet ($12.99 – $34.99).

If you are working in a tight space behind a cabinet, the Rocketfish 90-degree Coax Adapter prevents cable damage from sharp bends. How to Extend Your Cable Properly

For most modern internet and HDTV setups, use RG6 cables rather than the older RG59, as RG6 is designed for higher bandwidth.

Are you extending this for a modem or a TV antenna ?

Screw the small metal coupler onto the end of your existing cable by hand. Turn it clockwise until it is snug.