A mechanical actuator manufactured by Mitutoyo . It has a positioning range of 0-1" and a resolution of 0.00005" or 0.001 mm. The vernier scale marked on the control knob indicates position in inches, while the digital readout can be set to display position in either inches or mm. This type of actuator is commonly used in the field of lasers and optics for precision positioning of optical and opto-mechanical components.