The E27 threaded lamp holder with switch in black thermoplastic material allows you to use a lampshade or any decorative element with a E27 fitting, regulating its high with the use of the two ferrules. The switch allows you to switch on and off directly from the lamp holder, allowing the creation of suspension or table lamps even without a wall switch.  Material: Thermoplastic Fitting: E27  The black thermoplastic material has a uniform and opaque finish Kit consists of - E27 lamp holder with switch and 2 shade rings and 1 matching cylindrical cable retainer  Compatible with E27 fitting lampshades Strain relief clamp included Be sure to also look into our wide section of ceiling roses, bulbs, cables and lampshades to finish off your own very unique lighting. N.B. This lamp holder has a security system that, in order to protect you from electrical shocks while you are changing the light bulbs, does not allow it to unscrew. If the necessity to unscrew it should present, it is possible to unblock it by pointing at the security flap you will find at the base of the lamp holder with a screwdriver, while you are turning the lamp holder. Always ensure the electricity is switched off when dealing with the bulb holder.