Sold As A Pair Every quality knife needs a quality Tri-Angle Knife Sharpening Rods to go with it. Made by Spyderco, this Super Abrasive Tri-Angle Knife Sharpening Rods was developed with the true knife enthusiast in mind. It is 7''L X 1/2''W X 1/2''H and made of well-crafted Diamond Stone Encrusted Steel. These Diamond Spyderco Tri-Angle Knife Sharpening Rods are prefect for sharpening ultra-hard blade steels. They can be used to sharpen both Straight Edge and Serrated blades, Scissors, Awls, and many other tools. They are designed to be used dry and fit your Tri-Angle Sharpmaker Base.