AXYZ - 26029 Box Cutter CartridgeThe Box Cutter Cartridge is a very versatile utility knife holder for Tangential Knife Heads (part 26054). Trapezoid or utility knife blades are very inexpensive and this holder can be used on many materials very cost effectively. This device is commonly used to cut cardboard and similar materials. The Box Cutter Cartridge comes with five Super Trapezoid Deep Edge Blades (61329).