Abstract: This invention utilizes a linear motor to impact peening media. It has three major applications: (1) deep compression low surface work peening, (2) Almen strip arc height testing and (3) manual peening. This process differs from existing processes in that impacts are controlled in position, velocity and mass. The indentor tip may have single or multiple indentors. In its deep peening/low surface work this invention competes with processes such as Roller Burnishing, Low Plasticity Burnishing and Laser Peening. The Almen strip testing application fills a void in shot peening quality control. There are examples of Almen strips whose arc height behavior differed side to side. Others have differed between lots. Recent peening production lines have been shut down by incorrect arc heights. This invention is an alternative to manual peening processes such as Flapper peening and hand held nozzle peening.