The Dewalt DWP849 7” / 9” Variable Speed Polisher has a powerful 12-amp motor ball bear construction made for a long life. Desired finish results are delivered by the variable speed dial letting you set the maximum speed from 0-600/3500 rpm for different materials and applications. The electronic control maintains specified speed under load delivering desired finish results. Speed is controlled from 0 to dialed maximum setting by variable speed trigger. Dewalt DWP849 has heat-treated, precision-cut steel gears for smooth operation, external brush carps for easy servicing, large spindle lock button allows for easy and quick backing plate changes. Specifications: Amps: 12.0 AMPS Max Watts Out: 1250 W No Load Speed: 0-600 / 0-3,500 RPM Corded Spindle Lock Spindle Thread: 5/8"-11 Tool Length: 18 in. Tool Weight: 6.6 lbs Wheel Diameter: 7" , 9" Includes: 2 -Position Side Handle Rubber Backing Pad