2-1/4 HP EVS Router Motor Unit - DW618M. 1/4 in. Collet. 1/2 in. Collet. Wrench. The DW618M is the motor unit for the DW618 router. 2-1/4 HP (maximum motor HP), 12.0 AMP electronic variable speed motor provides the power to rout smoothly through the toughest hardwoods. Electronic variable speed with full feedback control for constant speed under load from 8000 to 24,000 RPM. Soft start to reduce start-up torque and for enhanced control. Dust-sealed switch provides durability and long switch life