The BOSCH GWS9-45 4-1/2” Angle Grinder with Lock-On Slide Switch is a light, handy grinder with plenty of power 8.5 amps and 11,000 RPM. The BOSCH GWS9-45 4-1/2” Angle Grinder with Lock-On Slide Switch has direct-motor cooling, giving it higher overload capabilities, and it has directed air flow that diverts dust away from vital components. This grinder has a two-position side handle. The BOSCH GWS9-45 4-1/2” Angle Grinder with Lock-On Slide Switch has a burst-protection quick toolless adjustable guard, a fast-change disc change and a large spindle lock. The Service Minderbrushes stop the grinder when preventative maintenance is required.