The MILWAUKEE M18 FUEL 4-1/2 in. / 5 in. Variable Speed Braking Angle Grinder, Slide Switch Lock-On is the newest addition to Milwaukee's battery-powered grinder lineup, generating 11A Corded Power, 5 Speed for Increased Control, and RAPIDSTOP Brake for Enhanced Safety. The POWERSTATE Brushless Motor delivers 3,500- 8,500 RPM and maximum sustained power to complete the toughest grinding and cutting applications, allowing users to push their cordless angle grinders harder and longer than ever before. REDLINK PLUS Intelligence ensures unmated levels of performance, protection, and compatibility. The Variable Speed dial provides 5-speed settings between 3,500 RPM and 8,500 RPM allowing for greater control in more applications. With tool-free accessory and guard adjustments, users will experience faster accessory changes and less downtime.