1. Needless to maintain, then save time and energy. 2. Needless to repair and after-sale service. 3. Disposable use, and avoid cross infection of contagious diseases. 4. Operate it conveniently with quick coupling and it is compatible with NSK QD-J 5. Attractive appearance and comfortable to handle it 6. Having great drive power 7. quick coupling is compatible with NSK QD-J, and 2 holes and 4 holes for your choice 8.Technical parameter: Applicabel air pressure 180-300KPA Applicable bur diameter 1.59-1.60mm Rotation speed 300, 000-380, 000r/ min Interface type quick changing type Head diameter 11.4mm