We're always looking for ways to improve, so we took our beloved froe and made it better. The steel blade is now case hardened, ultimately making it stronger and last longer. By using a special heating process and dipping the blade into a compound (usually high in carbon), a hard outer layer is formed around the blade. This layer protects the inner raw (soft) steel, allowing you to sharpen the blade more before reaching the raw steel.
Safer! All other methods put your hand below the cutting edge. Strike back upper edge with mallet (sold separately) to drive blade into wood. Pull on handle to pry splits from block.