"The Makita Cordless Cutoff/Angle Grinder produces 50 faster grinding with an impressive 10,000 RPM. Its more compact design and ergonomic shape fits like a glove with even pressure and easy control, as well as less operator fatigue. Uses an LXT Li-Ion battery for 280 total lifetime work with 2X more cycles battery and charger not included. Switch Type Slide w/lock on, Wheel Included Yes, Spindle Lock Yes, Variable Speed No, Speed RPM 10,000, Side Handle Yes, Wheel Diameter in. 4 1/2. Tool only battery sold separately Slide switch with lock-on"