Features 2 material components for even more applications and top load values in solid and hollow building material Intelligent self-activating functioning depending on the substrate, for a wide range of applications Best possible feedback (feel-good factor) of the plug, you can feel exactly when the plug is installed perfectly  No annoying rotation of the plug in the drill hole during the installation, thanks to the pronounced rotation protection  The smooth-running opening enables an easy activation of the screw and a safe installation into the screw channel The longer versions have additional "bite" in problematical building materials Short plug length allows quick fixing, less drilling and shorter screws The combination of soft and hard materials achieves an optimally matched screw-in and tightening torque Red expansion wings support the safe expansion and offer additional safety for the nylon main body Depending on the building material, the main body made from high quality nylon automatically activates the optimum function principle for permanent and safe hold The narrow plug rim prevents slipping in the drill hole