Sowoll Watermelon Knife Stainless Steel Kitchen Slicer Knife 7Cr17 Super Sharp Blade Watermelon Cutter Fish Beaf Slicing Tools
Reliable, not fragile steel. I think that the knife will easily succumb to sharpening the usual bar. Very comfortable and non-slippery handle. A bit thick blade, but thanks to the smooth plane on one side will be just right for cutting the Hamon. I believe that watermelon is cut, it will not be quite right because of its thickness.