The Rawplug Nylon Self-Drill Plasterboard Fixings require no drilling, simply pierce plaster and screw home. The nylon insulates against accidental electrical contact with a choice of panhead or countersink screws, flush fit finish. The Screw and fixture can be removed and re-used. (e.g. When decorating).Maximum Fixture Thickness: 12mm Ref: UTTK3298