Two part metal cord grip also available in chrome, black, white or bright brass finishes these are the 'must have' touches to finish off your lamp holder or ceiling rose.
A cable strain relief can help take some strain off the wire or flex from the weight of the item attached to it. Typically it has additional help from "knotting" the wire or the use of other forms of cord grip. Knotting is via a simple twist loop behind the relief.
Not limited to just these applications they are also suitable for any location requiring a secure and cosmetically pleasing cable exit.