LENGTH EXTENDER C Extend the length of your video cables without having to buy a longer cablePERFECT FOR COUPLING C Connect 2 F-Type coaxial video cables together (includes 4 adapters) EASY INSTALL C The simple screw on installation makes assembly and disassembly effortlessUNIVERSAL COMPATIBILITY C These extension adapters are compatible with all brands of RG59 and RG6 coaxial cables