The accusharp fillet knife sharpener is a must for every tackle box.In about 10 seconds you can make your filet knife razor sharp.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 service.Can be cleaned with soap and water or in the dishwasher.Sharpener Material: Diamond Tungsten Carbide