The Milwaukee 2887-20 M18 FUEL™ 5 Flathead Braking Grinder with a slide switch lock-on function is a versatile power tool designed to offer top performance. Notably, it possesses a POWERSTATE™ Brushless Motor that delivers up to 8,500 RPM, making it 18% more efficient than competitive models. For enhanced safety, it features a Rapid Stop Braking system that halts accessories in under 2 seconds and Overload Protection which prevents damage to the tool and battery during heavy applications. The device utilizes REDLITHIUM™ battery technology for superior run time. Battery not included!