Water being the softest element and being the sharpest blade |water jet|

There is no doubt that the water jet is currently the sharpest “blade” in the world.

Water jet cutting requires a high pressure from 200 Mpa to 620 Mpa, then spray it through a nozzle with an small diameter inner hole, which results in an outlet high speed of 800~1000 m/s. This water jet has very high energy to cut work pieces. The term abrasive jet refers specifically to the use of a mixture of water and abrasive to cut hard materials such as metal, stone or glass.