DEWALT DW621K 2-Horsepower VS Electronic Plunge Router Kit with Carrying Case and Universal Edge Guide Full wave electronic variable speed motor with soft start runs at 8,000-24,000 rpm with constant speed under load to ensure a quality finish in all materials Rack and pinion depth adjuster, with micro-fine adjusting allows quick, accurate set-up Integral dust collection system efficiently removes chips and provides superior bit visibility Spindle lock button allows for single-wrench bit changes Innovative rubber-coated knobs have plunge-lock and on/off built-in for maximum user control; 1/4-inch - 1/2-inch collet capacity for greater versatility