For those times when you just can't (or don't want to) drill a hole through an outside wall, this eight inch (overall length) piece of flat coaxial cable lets you run the coax through a window or door and still close the window/door. Sure, it's not the greatest thing to do to an RF signal and there is a tiny bit more loss than an equal length of round coax, but it's only 8 inches worth!
Works fine for satellite, off-air, and cable TV signals.