The StringKing Mark 2F Stiff is an updated version of the best selling faceoff head, the StringKing Mark 2F. While the face and design is the exact same as the original model of the head, this version is made to be more stiff than the original. The added sitffness allows for a stronger clamp when facing off. This is a huge benefit if you depend more on strength when facing off rather than speed. The stiff Mark 2F holds up better in the heat, and won't warp as quickly. This allows for a more consistent head when facing off, and after the faceoff when you win the clamp.