... to 3m 2.grinder 360 degree free rotating 3.cutting, grinding, milling, drilling and polishing product introduction :1. It can ... not only be used for cutting, grinding, milling, drilling and polishing stones, but also for curve ... 4.5M/minhead degreeany degreehead adjust degree±10°grinding curveany in and side curvegriding head rotation speed1440/2880/r/minpower source50Hz-380v