Fischer DuoPower Fixtainer With 210 Assorted Units The fischer DuoPower offers very good hold values as a result of its 2 components: Depending on the building material, the grey components made from high quality nylon automatically activates the optimum product function (expansion, folding, knotting) for the best hold. The expansion wings of the red component support the secure expansion and offer additional security to the grey component. Easy turning-in of the woodscrew and correct tightening to close. No over-tightening of the woodscrew. The preshaped edge on the plug head prevents the plug from slipping into the drill hole. Building materials: Concrete Solid brick Solid sand-lime brick Aerated concrete Vertically perforated brick Perforated sand-lime brick Plasterboard Gypsum plasterboard and gypsum fibreboards Hollow blocks made from lightweight concrete Chipboard Advantages: - Two component materials for top load values and intelligent functioning depending on the substrate.