I got those two types - the metal screw type and the one which tightens onto back of plasterboard as u screw it in. When drilling and u aren't sure if it's plasterboard do u drill 7mm as u would for normal brown plug then see it's plasterboard so put in the plasterboard plugs?
Drill tentatively; work out what it is then proceed?
Drill tentatively; work out what it is then proceed?