Bosch AG50-11VS 5-Inch Variable Speed Grinder, 11-Amp (Discontinued by Manufacturer) Robust 11-Amp 11,500 RPM Motor: Power and performance demanded by a professional Bosch Electronics System Plus: Advanced electronic package to protect motor and shut down tool in a sudden bind situation Variable Speed Dial: Provides the ability to adjust speed for specific applications Lock-on/off Slide Switch: For extended use applications Directed Air Flow: Diverts dust away from switch and vital components to extend tool life