All metal self drill plasterboard fixings. Precision drill tip geometry for faster cutting. Fits flush to board & can be used in double thickness plasterboard. Flange prevents accidental push through. Screw & fixture can be removed & re-used (e.g. when decorating). Will also provide a secure fixing into lightweight & aerated concrete blocks. (NOTE. an 8mm pilot hole is required for this fixing). Maximum Fixture Thickness: 12mm Pack of 100.