7 in. / 9 in. Electronic Variable Speed Polisher - DW849R. 2-Position Side Handle. Rubber Backing Pad. Clamp Nut. Powerful 8.0 AMP ball-bearing construction for long life. Electronic module maintains specified speed even under load. Conveniently-located variable speed dial lets user set maximum speed from 1000 to 3,000 RPM for different materials and applications. Variable speed trigger allows user to instantly control speed from zero to dialed setting. Heat-treated and precision-cut gears for s