Non-stage speed system R.P.M can be controlled min 0 - max 35,000 by Foot pedal and by Hand. Automatic protection system & Reset function Automatically shuts down if it has the breakdown and the malfunction. Turn on the power switch after solutions. It is re-operate Excellent durability Spindle is designed prevent dirt and carbon powder. Run on low speed Handpiece at low speed even is provided power. Easy bur exchange type using Cam Handle can be twisted easily and exchange burrs easily. Installed special ball bearing Special ball bearings are installed. It is bring less heat and low noise for operation. Bearing can be long used. Purpose It is the best product for instrument cutting of lab. It is very good for works necessary for powerful strength. It is excellent for finishing work of mold work with superprecision without swing of vibration bar. It is excellent for marking letters or can ing on the surface of woods, metals or shellfish.