Adopt special welding machine to combine two kinds different material together:HardBlade+Soft Handle Advantage: The handle can be adjusted by skilled person byspecial tools to get good "sett" after re-sharpening.
The hardness of the blade is what can guarantee the sharpness and durability. First weheat the steel more than 1000 degree Celsius This is harden process which will changethe steel's physical feature. Then quickly decrease the temperature to below zero. Thenwill keep the hardness to more than 65 HRC.