Makita-built motor delivers 10,000 RPM for faster grinding. Compact, ergonomic design at 12-1/2" long and only 5.0 lbs. for reduced operator fatigue. Slide switch with lock-on for operator convenience. Built-in L.E.D. protection circuit with over-torque control protects the motor. Ergonomic shape fits like a glove with even pressure and easy control. Soft grip handle provides increased comfort on the job. LXT Lithium-Ion battery and Rapid Optimum Charger produces 430% total lifetime work with 3x more cycles.