The MILWAUKEE M18 FUEL 4-1/2 / 6 Variable Speed Grinder, Paddle Switch with ONE-KEY is the next advancement in power and performance, generating 13A corded power, fastest cutting, and delivering up to 135 cuts per charge. The M18 FUEL 4-1/2 / 6 Braking Grinder generates 13A corded powerallowingyou to complete the toughest grinding and cutting applications, all on the M18 Cordless System. The POWERSTATE Brushless Motor delivers maximum sustained power and 9,000 RPM to remove material faster and increase productivity. REDLINK PLUS Intelligence ensures unmatched levels of performance, protection, and compatibility. The RAPIDSTOP Brake provides stop times under 2 seconds with an abrasive disc.The M18 FUEL 4-1/2 / 6 Braking Grinder includes an electronic clutch for kickback protection, as well asoverload protection to maximize motor life.Pair with the M18 REDLITHIUM FORGE XC8.0 Battery Pack for HIGH OUTPUT HD12.0 power in a smallersize,andlongestlife vs. REDLITHIUM batteries. The M18 FUEL 4-1/2 / 6Variable Speed Grinder, Paddle Switch with ONE-KEY takes cordless grinders to the next level in performance and run-time.