A rodlogic gate as featured in Drexler, K.E. Nanosystems: Molecular Machinery, Manufacturing, and Computation. New York: John Wiley & Sons (1992). (Chapter 12) http://e-drexler.com/d/06/00/Nanosystems/toc.html
Mainly usable for demonstration purposes of logic gates.
The nobs on the lower side should be compatible with lego-technic. The basis cubic grid size is 3mm.