The worlds first cordless braking grinder stops accessories in under 2 s, delivers the power of a corded grinder and has upto 10X longer tool life. The M18™ FUEL™ 4-1/2 in / 5 in grinder supplies maximum sustained power to complete the toughest grinding, surface preparation and cutting applications. The POWERSTATE™ brushless motor provides upto 10X longer motor life and lower cost of ownership. The M18™ REDLITHIUM™ XC5.0 battery pack delivers upto 4X more runtime and 20% more power. The grinder features REDLINK™ Plus™ intelligence, the most advanced system of cordless power tool electronics, for maximum performance. A rapid stop brake feature stops accessories in under 2 s. The 18 V Lithium-Ion grinder's thin body design gives it optimized balance to rest easily in your hands. Tool-free accessory changes using the FIXTEC nut 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® legendary high performance corded grinders for maximum durability on the job. Grinding wheel sold separately.