MK 1-Gang Surface Pattress Box White 16mm (13372)

Good morning, the screws that come with the plate switch itself will be used for this box, however it does depend on what front plate you are using as some plates are thicker than others and will require different screw lengths. If combined with a logic plus switch plate the screw length will need to be 14-22mm as the front plate is 9mm itself. As such it will depend on which front plate you have.

Hi CloudWalker, I can confirm that this product does have knockouts in the sides and base. I hope this helps.