The Bosch GWS9-45 4-1/2-in. Angle grinder is a light, handy grinder with plenty of power – 8.5 amps and 11,000 RPM. It 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. It has a burst-protection quick tool less adjustable guard, a fast-change disc change and a large spindle lock. Thermoluminescence brushes stop the grinder when preventative maintenance is required.