Our M18 FUEL™ 4-1/2" / 5" Braking Grinder with ONE-KEY™ Slide Switch, Lock-On 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. Our 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.