The MILWAUKEE® M18 FUEL 4-1/2" / 5" Braking Grinder with ONE-KEY Slide Switch, Lock-On Kit is the next advancement in power and performance of cordless grinders while enhancing safety with its RAPIDSTOP Brake. The M18 FUEL 4-1/2" / 5" Braking Grinder with ONE-KEY generates 11A corded power to complete the toughest grinding and cutting applications. The POWERSTATE Brushless Motor delivers maximum sustained power and 8,500 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. This battery-powered grinder includes an electronic clutch for kickback protection, as well as overload protection to maximize motor life. Compatible with ONE-KEY, this grinder wirelessly connects to a smartphone to track and manage the tool, providing visibility to where tools are across a network of jobs. The included M18 REDLITHIUM HIGH OUTPUT XC6.0 Batteriesdeliver 50% more power while running 50% cooler than the M18 REDLITHIUM XC Batteries. Experience faster accessory changes, and less downtime with tool-free accessory and guard adjustments, while remaining fully compatible with the most common accessories in the market. The M18 FUEL 4-1/2" / 5" Braking Grinder with ONE-KEY is the next level of jobsite productivity and enhanced safety in cordless grinders.