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. Features: The serrated anti-rotation feature prevents rotation in the drill hole during installation The narrow plug rim prevents slipping into the drill hole Great feedback (feel-good factor) of the plug. You can feel exactly, when the plug is installed perfectly Suitable for pre-positioned and push-through installation. For use in all building materials The required screw length is given by the plug length + fixture thickness + 1x the screw diameter. Suitable for wood and chipboard screws, as well as stud screws Contents 2 packs of 100 x DuoPower 8 x 40. Also available in LONG version of 6x50, 8x65 and 10x80. Both with or without screws Specifications: Dimensions: H:9.0 x W:9.0 x D:7.5 cm Weight: 0.2 kg Colour: Multi Material: High Quality Nylon, Plastic Model Number: 535455