No Drilling Required! Now you can Run a Coaxial Cable thru a Window, Door or Sliding Glass Door without having to drill into your homes walls. Perfect for people that live in apartments and would like to put an outdoor antenna on their balcony. Great for RV's too... makes it easy to put an antenna up on the roof of the RV or next to the RV and run the cable through a window or door. No Drilling Required.