WORX JawSaw Debris & Pruning Chain Saw. The WORX JawSaw is powered by electricity, so it produces no emissions. Different from gas-powered chain saws, our electric JawSaw doesn't require you to mix oil and gas or deal with difficult startups. And unlike the competition, the WORX features an automatic oiler that provides constant lubrication to both the bar and chain. Unlike with conventional chainsaws, the JawSaw can be used to make cuts directly on the ground-without fear of kickback or damage to the chain. No more bending over and propping up wood to make the cuts. Just put the JawSaw on the wood and push down to extend the bar and make the cut. The JawSaw also features Auto-Tension, an easy-to-use chain replacement and tensioning system. There?s one bolt on the JawSaw's body that does it all. In contrast, most standard chainsaws require two separate tools to replace and tension the chain or replace the bar. The JawSaw's patented chain tensioning system prevents over-tightening by automatically determining the proper tension when tightening.