The Bosch GWS10-45 4-1/2- In. Angle Grinder delivers more power than previous-generation models with the same size tool - 10 amps and 11,500 RPM. It has directed air flow that diverts dust away from vital components, and it has direct-motor cooling, giving it higher overload capabilities. For operator comfort and control, it sports a two-position Vibration Control side handle, making it less shuddering to run. It has a burst-protection quick toolless adjustable guard and a large spindle lock for a convenient disc change. The Service Minderbrushes stop the grinder when preventative maintenance is required.