Ball bearing construction. 0-2-7/16″ plunge stroke with presetting of 3 plunge depths. Rack and pinion depth adjuster with magnified scale. Micro fine depth adjuster. Variable speed with electronic feedback circuitry that maintains constant speed under load and provides a soft start. Longer length collet system for better holding power and less run out. 1/2″ collet capacity. Spindle lock. 10′ rubber cord. 15A, 8000 to 22,000 RPM. Includes 1/4″ and 1/2″ collets, template guide bushing adapter, and 2 wrenches.