Steel case - Power Unit of case is made of steel, has small, sturdy design. Non-stage speed system - R.P.M can be controlled min0~max35,000 by Hand and Power switch ON/OFF can be controled by Foot pedal. Excellent durability - Spindle is designed prevent dirt and carbon powder. 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 • AS a portable type. It is used for simple instrument cutting in dental 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.