Abstract: The side to side-back and forth rotary device is an alternative mechanism for enabling a device or devices to rotate side to side or back and forth. The collective parts of the said rotary device assembled in the fashion for which it is intended make it new in the art of perpetual motion. It's dependent devices, Electrofloss, Electrobrush, and the sander-buffer represent alternative products in their fields. Electrofloss and Electrobrush can compete against the prior art in the field of dentistry, and the sander-buffer can compete against its competitors in the automotive industry.