Spyderco Tri-Angle Sharpmaker Ultra Fine Sharpening Stone is a tool used to sharpen blades. The Spyderco blade sharpener can sharpen knives, scissors, and other blades simply and quickly. The white rod-shaped blade sharpener is made from steel and ceramic. Weighing only 0.13 pounds, it is lightweight enough to take with you when traveling. Use the sharpener on blades at home, when out camping, or when doing work that involves sharp tools.