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.