Hedstrom Endodontic Files – Stainless Steel, 21 mm, 6/Pkg, Size 20, Yellow. Hedstrom Files are used for more rapid enlargement of root canals. The cutting edges are inclined backwards, making insertion easy since there is no cutting taking place on the insertion stroke. When the instrument is withdrawn, cutting takes place and debris is carried away from the apex. Used for fast root canal enlargement. Backward incline of cutting edges facilitates easy insertion. Ensures no cutting on the insertion stroke. Color-coded plastic handle for easy size identification. The unique design and stainless steel construction of Hedstrom Files optimize their capacity to enlarge root canals rapidly. The cutting edges facilitate easy insertion through their backward incline that prevents cutting on the initial stroke.Cutting occurs after instrument withdrawal and the removal of debris from the apex. Hedstrom Files have outstanding flexibility that ensures maximum fracture resistance and a color-coded handle made of tactile plastic.Recommended for autoclave, dry heat, or chemical sterilization.