The Bosch GWS18V-50 18V 5-In. Angle Grinder delivers a four-brush motor design and optimized gear assembly, it provides a 0-10,000 no-load rpm, to perform professional cutting and grinding applications. The grinder provides a two-position Vibration Control side handle for better handling and less operator fatigue. This tool was designed for electricians, plumbers and other trades professionals who need heavy-duty portable power. It is designed for long tool life, with Bosch's Electronic Cell Protection and Electronic Motor Protection, optimized brush design. For user protection, this cordless grinder was engineered with a toolless quick-change, burst-resistant wheel guard and restart protection to avoid accidental startup.