The Milwaukee M18 FUEL HIGH DEMAND 4-1/2" / 5" Grinder Kit (2781-22HD) supplies maximum sustained power to complete the toughest grinding, surface preparation and cutting applications. The POWERSTATE brushless motor provides up to 10X longer motor life and lower cost of ownership. The 18V Lithium-Ion grinder’s thin body design gives it optimized balance to rest easily in your hands. Tool-free accessory changes and guard adjustments mean less downtime during work. The grinder is built with the same tool body, gearing system and anti-vibration side handle as Milwaukee's legendary high-performance corded grinders for maximum durability on the job. The kit includes two M18 REDLITHIUM HIGH DEMAND battery packs, a multi-voltage charger and carrying case.