Spyderco Tri-Angle Stone Cbn> Accessories

Cbn (Cubic Boron Nitride) Is A Grinding Agent Whose Hardness Almost Reaches That Of A Diamond Coating. It Has Superior Abrasion-Resistance And Better Heat Transfer Than Aluminum Oxide Or Silicone Carbide, Making It The Industrial Grinding Agent Of Choice. As Supplement (Rough) For The Proven Spyderco Triangle Sharpmaker. Set Of Two Stones.