a level device in the present invention is described as having an elongated rigid frame with an x - shaped profile . the level device has modularly attachable levels , which include levels that can be rotated about the lengthwise axis of the level device , rotatable levels attached to the frame , circular surface levels attached to the frame , and levels guided by visual laser beams . mechanical structures within the level device allow level modules to be swapped in and out based on user requirements . the level device has slide - able attachments which extend the footprint and measuring capabilities of the level .