.1 hp Straight-Line Pencil Grinder 60,000 RPM, Turbine Air Motor, Rear Exhaust, 1/8 Inch Collet, with Ceramic Bearings Tool has integrated collet with 1/8 Inch Collet Insert (51659) Turbine-Driven Air Motor Models are ideal for precision deburring and finishing on a variety of surfacesHigh-efficiency air motor has no wearable gears, vanes or bladesOil-free operation minimizes maintenance time and repair costsAir motor is controlled with patented governor, providing constant tool speed under loadQuality high-speed bearings are included. Housing has non-slip rubber grip for additional controlTactile cues on shaft end alert operator to rotating collet area. Changing of attachment is achieved with easy, two-wrench maneuverIncludes high-quality flexible air hose. Teal Tool Cap for easy tool speed identification when using multiple modelsCeramic Bearings provide better performance and durability with regard to high shaft speeds, dirt, extreme temperature and corrosion. Product Information Brand Dynabrade Part # 51731 Air Flow 40.0 Air Thread 3/8 Inch NPT Collet 1/8 Inch Exhaust Type Rear Height 1-7/8 Inch Hose ID 3/8 Inch HP 1 Origin Country United States Product Type Pencil Grinders RPM 60000