Patented LUBE-FREE Autochuck Turbine: Improves efficiency and saves time with quick, bur-changing feature. Eliminates the high cost and mess of repeated lubrication. Small Head-High Torque Design: Improves accessibility and visibility. High power enables fast and precise removal of tooth surface and amalgam to improve speed and quality of work. Sterility Assurance: May be autoclaved at 121 degrees C or 135 degrees C. 1 year warranty.