Practical box with different choice of 2-component nylon plugs in 3 sizes: 6, 8 and 10mm for all building materials. The fischer DuoPower depending on the substrate adjusts itself automatically to the building material and transfers the highest loads through the three product functions of folding, expanding and knotting. Comes with the practical click system for connecting multiple boxes. Features: Transparent lid ensures that compartments and contents can be viewed at a glance Suitable for pre-positioned and push-through installation Secure functions for solid (expansion) and hollow and panel building materials (folding/knotting) The narrow plug rim prevents slipping into the drill hole The description of the plug function and an overview of the appropriate building materials on the bottom of the FixTainers ensures extra security for the installation After usage of all plugs, the FixTainer can be kept and reused as a storage case The serrated anti-rotation feature prevents rotation in