Two 4" x 1" Diamond Whetstone sharpeners combine to create a lightweight sharpener that is great for home, camper, tool box, gardening shed, and more. Convenient size measures 9 1/2" long when open and 5" when closed. Folding plastic handles protect sharpeners when not in use. Sharpens in a fraction of the time required by conventional stones. No messy oils are needed, sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service.