The dewalt dcs391m2 18v xr li ion circular saw has a powerful and highly efficient pm58 fan cooled motor with replaceable brushes and delivers up to 3700 rotations a minute for fast work progress there is an ergonomically designed handle with a rubber over mould to optimise user comfort and workability the tool is designed to be extremely durable with a cast magnesium base for repetitive and accurate cuts there is an in intelligent variable speed trigger as well as a keyless bevel and electr