DeWalt Polisher 849X Variable Speed Polisher with Soft Start: – Powerful, 12.0 Amp, all ball-bearing construction for long life and performance for the most demanding applications- Electronic module maintains specified speed under load delivering better finish results – Conveniently located variable speed dial lets user set maximum speed from zero to 600/3500 rpm for different materials and applications – Variable speed trigger allows user to control speed from 0 to dialed maximum setting – Heat-treated, precision-cut steel gears for smooth operation – Wool Ingestion Shields eliminates wool ingestion increasing tool life and reducing service costs – Non Mar Rubber Gear Case Cover reduces surface imperfections and improves gripping suface