The Milwaukee M18 FUEL 9 in. cut-off saw w/ ONE-KEY is an extremely versatile solution for cutting a large variety of materials. The M18 fuel 9 in. cut-off saw runs on Milwaukee's M18 REDLITHIUM batteries instead of using gas like most traditional cut-off saws. This saw delivers the power to cut reinforced concrete as well as a large variety of other metal and masonry materials. It delivers this performance while still being up to 50% lighter than gas saws that dominate the market today. By utilizing Milwaukee's M18 REDLITHIUM high output HD12.0 battery, this saw delivers N gas headaches. It produces N fumes so it can be used indoors, it starts up instantly, it eliminates the need to mix gas and oil, and there is N gas engine maintenance. The battery will also work on any of Milwaukee's other 200+ M18 solutions. The M18 FUEL 9 in. cut-off saw also has ONE-KEY integrated so users can wirelessly connect the tool with their smart phone to track and manage the tool.