Perspex® Mirrored Plastic Light Switch Surrounds, supplied in 8 different colours which can be selected using the drop-down box. The Finger Plates are 125mm x 125mm, with the inner cut-out being 80mm x 80mm. These covers are easily fitted by removing the two screws and fitting diagonally over the switch plate the centre hole is big enough to manoeuvre over the switch without the need to un-wire it though we recommend the installation is carried out by a competent electrician, once in place the screws need to be tightened whilst ensuring the plate is sitting square you must also bear in mind that the plate is made from 3mm thick perspex so you must make sure that the screws you have are long enough to allow for this thickness.