Power To Grind: World?s first cordless grinder with corded performance. Utilizing a POWERSTATE Brushless Motor, the M18 Fuel 4-1/2 in. / 5 in. Grinder, Paddle Switch No-Lock, delivers maximum sustained power to complete the toughest grinding, surface prep, and cutting applications while providing a lower cost of ownership with up to 10X longer motor life. REDLITHIUM XC4.0 Battery Technology provides superior pack construction, electronics, and performance deliver 2X more run-time and more work over pack life than any battery on the market. REDLINK PLUS Intelligence has the most advanced system of cordless power tool electronics, providing optimized performance, electronic clutch, and overload protection using total system communication between tool, battery and charger. The thin body design delivers optimized balance to rest easily in the users hands. 100% tool-free-tool - No wrench, No Screwdriver, No problem: Tool-free accessory change to easily change ?all accessories without a wrench and a toll-free adjustable guard for quick guard installations and adjustments. The M18 Fuel 4-1/2 in. / 5 in. Grinder, Paddle Switch No-Lock proves corded durability in a cordless tool by utilizing the same metal housing, gearing system, guards, flanges, and anti-vibration side handles as legendary high performance corded grinders.