The fischer DuoPower has a very high holding value due to the 2 components: The grey component made of high-quality nylon automatically activates the optimum operating principle (expansion, folding, knotting) for optimum hold, depending on the building material. The expansion wings of the red component support the reliable expansion and offer additional security for the grey component. Simply screw in the screw and tighten it well. Do not over-tighten the screw. The edge on the head prevents the plug from slipping into the drill hole.
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