The M18 FUEL 4-1/2 in. to 6 in. braking grinder is Milwaukee's most powerful small angle grinder to date, with a high performance brushless motor that generates 13 A corded power. The POWERSTATE brushless motor delivers 9,000 RPM, giving the tool the power needed to exceed performance expectations in all applications, as well as longer motor life, providing lower cost of ownership compared to brushed motors.