Double sided Diamond Whetstone sharpeners combine to create a lightweight sharpener that is great for home, camper, tool box, gardening shed and more. Folding plastic handles protect sharpener when not in use. Sharpens in a fraction of the time required by conventional stones. No messy oils needed–sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service.Made with real diamond (monocrystaline). Easy to use – requires only light pressure to produce a keen edge. Uses water as a lubricant. Can be used to hone and sharpen steel, ceramics, glass, tungsten carbide, stone, etc.