2 Line Tool X-Y-Z Micropositioners, L and R Model A.
Model A Specifications: This model will produce movements in the X-Y-Z planes. Each slide has 1/2 inch travel. Dimensions of the mounting slide are 1-3/4 inches wide by 1-5/8 inches high. The mounting slide has four #6-32 tapped holes. There are four drilled and counterbored holes in the base. The micrometer heads are graduated with .001 inch divisions.
They are used with some small cosmetic imperfections but work very smooth with no play.