The E27 smooth lamp holder in black thermoplastic material with switch allows you to to connect any E27 fitting lightbulb.  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 Kit consists of - E27 lamp holder with switch and 1 matching cylindrical cable retainer  The black thermoplastic material has a uniform and opaque finish 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.