If you own a knife, you need this sharpener. In about 10 seconds, sharpen knives, cleavers, axes, machetes, and many other cutting tools. The large ergonomic handle fits either hand safely and securely. The full length finger guard protects your fingers. The sharpening blades are diamond-honed tungsten carbide and provide years of reliable use. Will not rust and can be cleaned with soap and water, or in the dishwasher.