Polished Copper Evolve 1 Gang Master Telephone Outlet - Black Insert About Product: Screw terminals Easy to install, supplied with fixing screws and installation instructions Used for the main telephone socket Screwless front plate clips on and off easily, ideal for redecorating - polycarbonate construction with metal veneer Shuttered socket Minimum mounting box depth 35mm This Evolve Polished Copper master telephone socket from British General uses a screw terminal connection, and should be used where your telephone line enters your property. This is the best place to connect your router as it's where you're most likely to get the best performance and fastest speeds for your broadband. If you have more than one socket, the master socket is the one that will feed any extension sockets. This socket has a low profile screwless flat plate that clips on and off, making it ideal for modern interiors.