Spyderco 603Cbnpr Cubic Boron Nitride Sharpening Rods For Gauntlet Sharpener - Cubic Boron Nitride (CBN) is a superabrasive that is second in hardness only to diamond. It offers greater abrasion resistance and thermal conductivity than conventional abrasives like silicon carbide and aluminum oxide, making it the preferred abrasive in many advanced industrial grinding applications. Now you can combine the advantages of this fast-cutting abrasive with the convenience and ease of use of Spyderco's Gauntlet sharpener with these CBN rods. Multipurpose - Now you can combine the advantages of this fast-cutting abrasive with the convenience and ease of use of Spyderco's Gauntlet sharpener. Durable - Superabrasive that is second in hardness only to diamond. High Performance - Offers greater abrasion resistance and thermal conductivity than conventional abrasives like silicon carbide and aluminum oxide. Includes - (2) Cubic Boron Nitride Sharpening Rods.