High Quality Made out of the high-tech material magnesium Advantages of magnesium: the material is not only lightweight, but also ensures the perfect fit of the blades Blades are made of finely ground hard carbon steel – with a hardness of more than 62 hrc, the steel used is much harder than high-quality kitchen knives (approx. 55 hrc) Dynamic Torsion Action® prevents the tip of the pen from breaking, as the blades are under permanent tension