Description: The Makita N9500N 4" Hand Grinding Machine has an electric power of 570 Watts with a voltage of 220V/50Hz. The 4" Hand Grinding Machine can rotate at a no-load speed of 12000 rpm. The official warranty from Makita is for 2 years.Voltage 220V/50Hz Electric Power 570 Watt district. No Load 12000 rpm Spindle Size M10 x 1.25 Stone Size 4" / 100 mm Bowl Brush Size 3" / 75 mm 2 years warranty