POWERSTATE brushless motor: increased cutting speed and power through the toughest applications Redlink plus intelligence: the most advanced system of cordless power tool electronics, provides optimized performance and overload protection using total system communication between tool, battery and charger REDLITHIUM battery technology: superior pack construction, electronics, and performance deliver more work per charge and more work over pack life than any battery on the market Milwaukee REDLITHIUM XC 5.0 battery provides up to 2X more run-time, 20% more power and 2X more recharges than standard lithium-ion batteries Includes: one M18 FUEL 4-1/2 in./5 in. grinder, slide switch lock-on (bare tool) (2781-20), two M18 REDLITHIUM XC5.0 extended capacity battery pack (48-11-1850), 1 M18 and M12 multi-voltage charger (48-59-1812), 1 carrying case, 1 flange nuts, 1 wheel guard, 1 spanner wrench Part of the M18 family of over 175 plus tools 100% tool free: make all accessory changes and guard adjustments without a wrench for increased productivity Power to grind: world's first cordless grinder with corded performance Durability: same metal housing and gearing system as legendary high performance corded grinders