This Smart Socket kit includes a front lid that takes a 15A BS546 round pin or a 13A BS1363 rectangular pin (UK standard) socket outlet. All Smart Sockets are injection moulded in tough resilient ABS and comprise of 3 parts the body lid and clamp. Kits are shipped with all the necessary screws to assemble them along with full fitting instructions. Smart Sockets are designed for use with standard 48.3mm outside diameter aluminium scaffold tubing; to fit them you only need to drill a single 16mm hole in one wall of the tube. Then simply press the Smart Socket into place and tighten the 2 self tapping screws; you can then install the wiring for your lighting bar.