Finally, a Knife Sharpener anyone can use! No more messy oils or stones. In about 10 seconds, you can sharpen knives. The large ergonomic handle fits either hand safely and securely. The full length finger guard protects your fingers. Sharpening blades are Diamond Honed Tungsten Carbide and provide years of reliable use. AccuSharp Knife Sharpeners will not rust and can be cleaned with soap and water, or in the dishwasher. Replacement sharpening blades are available.