Traverse orifice opener: A rotary file with a triangular cross-section for starting mechanical (slow handpiece) endodontic treatment, remolval of the dentin and establishing a root canal. High resistance to stress and deformation. More tapered glide path, reduced work load. Higher cutting efficiency. Non-cutting tip, less debris apical extrusion and a lower risk of perforation. Sterile individually packaged, disposable. Contains Ni, Ti, Cr. Traverse orifice opener, 4 files of the same size: .25/.08/17mm.