As in every OK-VISE Fixturing Concept system, the basic modules in the Grid System are clamp, stopper, side guide and riser block modules. There are fixed and adjustable stoppers in the system, additionally single directional clamp modules share the same base module than adjustable stoppers.

Compared to fixed modules in the Grid system, with adjustable modules the place of the jaw can be moved in 2.5 mm steps.
If the difference in workpiece sizes is larger than the total movement of the jaw, then the  module will be moved 50 mm to the next positioning hole location on the grid platform