Shootingsight S7 Rolled Plate Tool Steel is ALOT tougher than any hammer out there. I forget what FFT hammer is made of but I remember making note of the fact that it was less superior material and does tend to deform because it’s softer that S7, and S7 is extremely tough, durable and has a really high impact resistance. Only drawback is that you need to oil it for protection, unlike stainless. Although, the shootingsight hammer is NiB coated. Of course I could be wrong, and this my opinion, but from experience, this hammer is an absolute beast.