These single surface mounted pattress back box and made from modern plastic (bakelite). Back boxes are used behind the plate switch or wall socket, they allow the face plate to be screwed and secured to a wall. The back box itself should be screwed into position. Depth is determined by the number and size of the wires to be contained, The more and thicker the wires the deeper the box needs to be. These fittings can be used in many domestic and commercial applications.
Single Switched Socket 13 amp BS1363 with brass terminals. Fits any single (1 gang) back box
Plate Switch 2 Gang 2 Way 10amp this format of light switch has two discreet switches on a single face plate. Basically this is two x 1 gang 2 way switches on a single face plate.
Metal Flush Mounting Back Box. Single 1gang 25mm deep