Fangrui Product Details [new Version]the Upgraded Version Of The Pneumatic Chamfering Machine, The New Design Adopts A New Shell With High-quality Bearings, Equipped With High-precision Heat-treated Tungsten Steel , Sturdy And Durable, High Cutting Efficiency, And Long Service Life. [clever Design]5-speed Air Valve Adjustment Thickened Knob, Freely Adjust The Required Gear Speed; 0.1mm-1.5mm Chamfer Size Can Be Adjusted At Will; 360-degree Rotating Exhaust Port, Good Heat Dissipation, High Work Efficiency; Safety Switch It Is Used To Prevent Accidental Touch And Protect User Safety At All Times. [stable Performance]free Speed Can Reach 30000rpm, Air Consumption Is 0.4/min. Can Withstand High Impact And High Speed, High Concentricity, Low Vibration, Low Loss, And More Durable; The Speed Is Improved, And The Chamfer Is Smoother. [multi-use]using The Thinnest Outer 1mm Hexagon Nut To Lock The Bearing, It Can Be Chamfered In The Narrowest And Shallowest Space. Suitable For Various Irregular Chamfers, Such As Straight Edge Chamferi