0.1 hp Straight-Line Variable Speed Pencil Grinder 35-60,000 RPM, Rotary Vaned Air Motor, 3mm Collet Dynabrades Variable Speed Pencil Grinder offers precision deburring, finishing and engraving, with easily adjustable speed to suit each applicationThis is an essential tool for turbine blade manufacturers, tool & die shops, machine shops, investment castings, jewelry, medical implants, composites and more! High-Quality Air Line 1/4 Inch (6 mm) in diameter and 5 feet (1.5 m) in lengthOver-hose Assembly Helps direct air and excess oil away from operator - 12 Inch (305 mm) in lengthVariable Speed Flow Control Adjust your desired speed with dial, up to 60,000 RPMUnlike roll valves, your speed stays set when turning tool off and onOne Touch Starts Tool at Desired Speed Handy push-button for simple on/off operationTool comes on at same speed as when you shut it off! Ergonomic Tactile Grip Tactile, non-slip grip is insulated for comfortable useLarge Precision Bearings Ensure longer tool life than competitive modelsSpindle Lock Allows Easy Collet Tightening With thru-hole for quick accessory changeNo struggling with two wrenches! Low Collet Run-Out Run-out of less than .003 minimizes vibration and ensures high-quality cut. Model accepts optional collet inserts: 1/16 Inch (51760) and 3/32 Inch (51674). Product Information Brand Dynabrade Part # 52855 Collet 1/8 Inch Height 72 Inch Origin Country Canada Product Type Pencil Grinders RPM 60000