The accusharp pro knife and tool sharpener sharpens knives (even serrated knives), cleavers, axes, machetes, and many other cutting tools in about 10 seconds.The large ergonomic handle is made of brushed aluminum finish and is framed with an over-molded rubber grip.The full-length finger guard protects your fingers.The sharpening blades are diamond-honed tungsten carbide and provide years of reliable use.The accusharp pro knife and tool sharpener will not rust and can be cleaned with soap and water.Sharpener Material: Diamond Tungsten Carbide