K Files- A pre-applied suitable rubber stopper for each shape and length is fitted initially- Shape edge for fast and effective treatment with a superior cutting ability- Wrapping treatment gives the surface a mirror finish.Allows a fast cleaning during usage- High safety: Thread hole to prevent dropping. ISO colored grip show taper of file- Grip is marked with number and symbol to easily identify and file- Ergonomic design of grip for comfortable handling- Corrosion resistance and high durability