10 Best Circular Saw Reviews [ 2021 Buyers Guide ]- portable circular saw ,10/4/2018· The sidewinder circular saw that properly describes the words, strong, tough, powerful, lightweight and feature-rich is the Makita 5007MGA circular saw. From a design perspective, you can quickly tell from the moment you open the case housing the tool that the Makita 5007MGA is definitely well thought by the engineers before any production was started.Who Invented the Circular Saw? - Craft Like a ProAnother inventor who developed his concept of a portable circular saw was Art Emmons. In 1929, he developed the porter cable circular saw, which combined an electric motor and helical drive. His model was very lightweight and compact, making it ideal for traveling from one job site to another.