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 no gas headaches. It produces no fumes so it can be used indoors, it starts up instantly, it eliminates the need to mix gas and oil, and there is no 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.