Dewalt dcs391 165mm xr premium circular saw 2x 40ah li ion 18v dewalt dcs391n xj this 18v premium circular saw from dewalt has been designed with an intelligent trigger allowing total control over all applications it has a powerful and highly efficient pm58 fan cooled motor with replaceable brushes delivering up to 3 700 rotations per minute for a fast cutting action the saw also has a spindle lock for quick and easy blade change other features include the cast magnesium base allowing