M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder Paddle Switch w/ Super Charger and 8.0Ah BatteryThe 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 up to 10X longer motor life and lower cost of ownership. The 18 Volt Lithium Ion grinders 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 Milwaukee M18