Razor sharp, super-hardened surgical stainless steel blades with one serrated edge to cut through the toughest materials. Blades tempered to a Rockwell hardness of C56 for unsurpassed durability. Contoured polypropylene handles with large ring provide maximum control and comfort. Extra large rivet with a rated strength of 88kg assures rugged durability. Fully auto-clavable to 143�C (290�F). Inspected and packaged in the U.S.A. Two Year Quality Performance Guarantee.