Non-retail Packaging * Black * 5 1/4 * 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 143c (290f) * Inspected And Packaged In The U.s.a. *