Two material components for even more expansion volume and optimal load values in solid and hollow building materials. Intelligent, self-activating functions depending on the substrate. Suitable for a wide range of applications. Provides the best possible feedback from the anchor. You can feel when the anchor is perfectly seated. No annoying rotation of the anchor during installation, thanks to the pronounced anti-rotation features. The easy-running opening allows for simple placement of the screw and secure guidance and fixation in the screw channel. The long versions offer additional grip in problematic building materials.