The mini rod is very useful for hand-held applications, the mini rod can be used with any full size prism, mini prism or any prism that does not have a built-in circular vial. The short height makes it possible to get into small obstructed areas in construction, or wooded sites, etc. The mini rod height is 120 mm (0.394 ft.) Weighs 0.4 lb (0.018 kg)