The device is used for
Power point (maximum biting force): 
Boos (1940) demonstrated that the maximum biting force in an  individual is registered at vertical dimension at rest. 

The method involved attaching a pressure indicating gauge which displayed the biting pressure, to a central bearing plate and screw on the occlusal rims as previously described. 
The device is called bimeter and the maximum biting point is termed as power point. 
The screw is adjusted to increase or decrease the vertical dimension and the bite force is recorded with each insertion. Boos stated that the vertical dimension of  occlusion is the rest position or maximum force minus 2 mm.
Vertical dimension
Horizontal dimension
Orientation jaw relation
All of the above