Kraft Tool Co.® DW040 Utility Knife with Easy Change Blade 6 per Case. The strong cast aluminum base holds an adjustable blade. A twine cutter is built into the end of the blade to quickly cut line and twine without exposing the sharp edge of the blade. The blade is easy to replace with the press of a button. A contoured plastic grip makes the knife easier to hold without slipping. Extra blades can be kept in the base of the handle for easy access while working. A hole at the end of the knife can be used to toggle the knife.