Milwaukee's M18 FUEL? 4-1/2" / 5" Braking Grinder with ONE-KEY? Paddle Switch, No Lock 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. Milwaukee's M18 FUEL? 4-1/2" / 5" Braking Grinder with ONE-KEY? 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 you with visibility to where tools are across your network of jobs. The M18? REDLITHIUM? HIGH OUTPUT? XC6.0 Batteries (not included) deliver 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 MILWAUKEE? M18 FUEL? 4-1/2" / 5" Braking Grinder with ONE-KEY? is the next level of jobsite productivity and enhanced safety in cordless grinders.