How to turn on the light hole after gypsum board ceiling

Then you can nail two ordinary nails on the wood strip, and the distance between the two nails is half the size of the opening; Then determine the center of the hole, nail a nail in this center, and then circle back and forth like a compass, so that the gypsum board can be broken-then the hole of a downlight opens. In addition, the building materials store also sells finished hole openers. ☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆973 ☆☆☆