Pfeil Woodworking Knife, bouble bevel blade only.  Width 6mm, Length 160mm, thickness 2mm.  Made of alloyed Swiss tool steel.  The Swiss Pfeil company is the leading European maker of carving tools.  Every blade they manjufacture is drop-forged from a very tough alloy made exclusively for Pfeil.  The blades are subsequently heat-treated in an electric furnace and then ground and polished by hand.