2 1/4 HP. 12 A. 8,000-25,000 RPM. Tool-free conversion. Quick clamp system allows tool to be moved from base to base with ease. Microfine bit depth adjustment systems. Fast, precise bit depth adjustment. Soft start reduces start-up torque. Constant response circuitry. Monitors and maintains desired RPM for consistent performance . Exclusive precision centering design centers bit precisely. Included: 1617EVS motor, plunge base RA1166, fixed base RA1160, 1/2-in. and 1/4-in. collets, templet guide adapter, 2 drop-forged wrenches, 2 chip shields, and a case.