Tool has integrated collet with 3 mm Collet Insert (51673) Turbine-Driven Air Motor Models are ideal for precision deburring and finishing on a variety of surfaces. High-efficiency air motor has no wearable gears, vanes or blades. Oil-free operation minimizes maintenance time and repair costs. Air motor is controlled with patented governor, providing constant tool speed under load. Quality high-speed bearings are included. Housing has non-slip rubber grip for additional control. Tactile cues on shaft end alert operator to rotating collet area. Changing of attachment is achieved with easy, two-wrench maneuver. Includes high-quality flexible air hose. Teal Tool Cap for easy tool speed identification when using multiple models.