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) for the best hold. The expansion wings of the red component support the secure expansion and offer additional security to the grey component. The angle hook provided is optimally matched to the fischer DuoPower. This guarantees the perfect hold.