The truth is the outlet wants to be a little bit even larger so as to be certain it gets via both of those walls (of a standard cavity wall) comparatively simply Using the minimum amount prospect of damage.We might advocate a gap of 20mm in diameter, these size drill bits are not that pricey and fairly uncomplicated to get. The plug may just about

In reality the hole desires to be a little more substantial In order to be certain it gets through both equally partitions (of an ordinary cavity wall) reasonably easily Along with the minimum prospect of injury.I purchase the straight pole adapter Therefore the unit will slide and lock more than the pole which thoroughly snaps on into the device w