a system and technique wherein an ultra high - pressure stream of water passing through a calibrated orifice achieves high water velocity . the orifice would be made from an extremely hard material such as sapphire or diamond . this high velocity stream impacts on a driving fluid turbine impeller attached to a shaft forming an opposed high - speed tool , which results in very high rotational speed with very high available power to do work . off / on control of the system would be accomplished through an integrated ultra high - pressure valve system .