I have recently purchased 2 sets of downlights which I have never fitted before! The hole sizes stated are 66mm and 72mm. I cannot find a 66mm hole cutter anywhere and wondered what size up I could use to create the hole. i.e would a 72mm hole for the 66mm downlight be too big and what problems might it cause? Help would be appreciated as ive just boarded the ceiling and am about to try and purchase suitable hole cutters.
Thanks
Thanks