Feature:50mm DeepMade of fire retardant durable PVC plastic, can easily be fastened together, forming a unit of 2, 3, etc. Offices, thanks to the fact that square, there is more free space for wires. Suitable for both Chinese (square back) and European (round back) electrical installations (sockets, switches, dimmers, etc.).Brass Screw thread housed in plastic posts，The nut can be adjusted on the line according to the actual situation to prevent the screw from sliding outSingle side double screw hole design can prevent screw holes from being damaged due to incorrect operation,Cannot use back box.(Note that if single side double screw hole are damaged, you cannot use dark box.）11 cable in/out points.Convenient for you to wire from all directions, no need to pay extra to buy other equipment or damage the back boxHigh quality and high strength:Thickened surface and Can be used for many years.People weighing 75kg won't get deformed when standing up.Approved for Reliability & SafetyThe same product can be splicedScrew length is 2.5cm socket mounting screwSuitable for sockets of 86mm, 172mm, 258mm, 344mm, 430mm length