TigerSharp Titanium Bonded Replacement Blades - 4pack, Smooth Includes 4 large smooth edge Titanium Bonded replacement blades for use with TigerSharp Fixed Knife #19015. Titanium Bonded Blades are 3x harder than Steel and stay sharper, longer. Blades resist corrosion and adhesives. TigerSharp knives are innovative knives that never need to be sharpened. Simply remove the dull blade and slide a fresh Titanium Bonded blade between the guides. It's quick, easy and safe! Use with the TigerSharp fixed knife, #19015.