5 S K (18 pieces) with screw. The Fischer Duopower offers very good holding values thanks to 2 components: the grey component made of high-quality nylon automatically activates the optimal functional principle (spreads, flaps) for best grip. The expansion wings of the red component support the secure spread and provide additional safety to the grey component. Easy to screw in the screw and correct “pull” at the end. No over-tightening of the screw. The edge shaped on the dowel head prevents the dowel from slipping into the bore hole. The Duopower is the first choice when attaching skirting boards, cable ducts, pictures, decorations, soap dishes and toilet paper holders. Features: Combination of two material components for more performance · Safe functions for full (spreading) and perforated building materials (flaps) · Easy to install: narrow dowel edge prevents slipping into the borehole · Best possible feedback from the dowel – you can feel that the dowel sits perfectly · With matching screw 4.0 x 35 for perfect hold. Technical data: dowel features: includes countersunk screw · Contents: 1 set · Material: Nylon · Product type: dowel set · Product dimensions: length: 25 mm · Screw diameter: 4 mm Box contents: 18 x Duopower 5 x 25 mm · 18 x countersunk screws 4 x 35 mm.