This Ferrex 40V cordless Angle Grinder & 20/40V Battery is essential for tackling the most difficult of cutting jobs, such as stone, with ease. Get the tools you need for the work that has to be done, starting with this angle grinder. This angle grinder is compatible with the Activ Energy platform, this set includes a 20/40V Activ Energy battery and charger to ensure they stay powered up.