It functions great in medium-low to high rpms. The low setting makes the grinder kinda grind and rattle inside the housing,witch is the only Con I have with the performance. I'd also like to add how much more comfortable the handle trigger is than my old dewalt with paddle switch .
4 1/2 Inch 7.5 Amp Variable Speed Angle Grinder From the Manufacturer Kawasaki power tools and equipment deliver quality value and satisfaction to do-it-yourself consumers. Kawasaki power tool users rate Kawasaki value higher than any other leading brand. For over 35 years Kawasaki has brought consumers the highest level of fun and adventure with products that deliver unbridled power and excitement. Powerful 7.5 amp motor. Comfortable no-slip matte grip. Reversible side handle. Spindle lock for quick and easy wheel changes. Variable speed 3,000-11,000 RPM. 5/8 x 11 TPI spindle. Includes grinding wheel and wrench. Kawasaki 841428 Features: Powerful 7.5 amp motor Comfortable no-slip matte grip and reversible side handle Spindle lock for quick and easy wheel changes Variable speed 3,000-11,000 RPM. 5/8 x 11 TPI spindle Includes grinding wheel and wrench Kawasaki 841428 Specifications: Dimensions: 2.5L x 15.25W x 8.25H Weight (lbs): 3.52