American Dental Excavator Dental Endodontic 31 Double End Disk-Shaped Blades Design form: double-ended Blade shape: disk Design designation: endodontic Material and location: steel, corrosion resisting overall Surface treatment and location: passivated overall Pattern/style identification: 31 Iii part name assigned by controlling agency: excavator dental endodontic 31 double end disk-shaped blades