It's a simple and useful instructables. If you have more then one knife in your drawer, you might need this if you want to keep your edge sharp. You can also use a knife block, but I don't like this alternative because it take to much space on my workspace.
Step 1: Materials and tools
-Knife that need a new sheath
-Old box of frozen pizza (or any other kind of cardboard)
-Pen or pencil
-Rulers or measuring tape (rulers work best)