The Fischer Duo Power offers very good hold thanks to the 2 components:The grey components made from high quality nylon automatically activate the optimal functional principle (struts, flaps) for optimum grip.The expansion wings of the red component support the safe spreading and offer additional safety to the grey component.Simple tightening of the screw and correct "pulling" at the end.No over-twisting of the screw head.The preformed rim on the dowel head prevents the dowel from slipping into the bore hole. The Duopower is the first choice for fixing skirting boards, cable ducts, pictures, decorations, soap dishes and toilet paper holders, for example.Technical data:Drill hole diameter: 5 mm, dowel length: 25 mm, Min. borehole depth: 35 mm. Min. screw depth: 28 mm. Min. sheet thickness: 12.5 mm, Chipboard/wood screws: 3 - 4 mm, Delivery:100 pieces.