Just to confirm - these support ALL thicknesses of plasterboard! 12.5mm & 15mm. They have an adjustable core.
As a handyman I use these quite a lot and they are very good. Great deal thanks.
Just to help out confusing info, red and yellow are screw fitted, brown and blue bolt fitted, drill your hole insert plug, get correct screwdriver and push the plug, the plug will expand in length from 9.5mm to 15mm long that will fit all plasterboard thickness with cavity behind it then turn your screw/ bolt to open wings and reduce plug to correct thickness. If plasterboard is dot and dab ( stuck to brick wall), over-boarded, insulated, flush on top of other object you will need the undercutter tool to shave off the back of the plasterboard to allow the wings to open.
Dot n dab walls just use frame fixings...they work a treat for heavy items like tv brackets etc.
Tried these on a plasterboard wall with a skim on top - the fixing just squashed and broke as it couldn’t penetrate the wall. So what are people fixing to bare plasterboard in a house? I can’t see an application for these, at least for myself.