Ideal for rapid reduction of all dental materials such as amalgam, porcelain, metals, and tooth structure. Sharp blade design and multiple crosscuts provide the ideal combination for crown removal and endodontic access. Single-piece construction eliminates bounce, chatter, and vibration. Packing:10/Pack Product Features Specifications Usage Instruction US no.: 558 Size: 012 Diameter(mm): 1.2 H/L(mm): 3.8 Shape Number: 558 Shank Type: Friction Grip