Very interesting club head, not sure if just the face is carbon and tungsten or the whole head? Has a HRC 50 rating, I'm guessing that it is very hard?
What Is Steel Hardness?
Steel hardness measures how well steel resists indentation, abrasion, and deformation. The Rockwell Hardness Scale (HRC) is commonly used to quantify this property, with higher HRC values indicating harder steel.