DUOPOWER 10 x 50 cubicle in practical 200 units. The Fischer Duopower offers very good hold values thanks to the 2 components: the grey component made of high-quality nylon automatically activates the optimum operating principle (expansion, lock, knot) for better grip. The expansion wing of the red components reinforces the secure expansion and offer additional safety to the grey components. Easy screw turning and correct "removal" at the end. The screw does not overspin. The incorporated edge on the head of the cue prevents the plug from sinking into the drilling. Benefits Two components for top loading and intelligent operation (expansion, folding, knotted) depending on the stand. Better feel of the cue. You can feel exactly when the cue is installed perfectly. Flange prevents slipping into the hole. Serrated fins prevent rotation in the hole during installation.