The Multi-Plier 600 Black Needlenose with Carbide Tan Insert cutters and Berry Compliant sheath begins with high quality stainless steel. Then Gerber incorporated patented one-handed opening pliers. Top that off with replaceable tungsten carbide wire cutters. When the cutters become dull or misshapen simply rotate the tungsten carbide cutters 120-degrees, and you've got yourself a good-as-new wire cutter. After three rotations, the entire cutter can be replaced.