Replacing the blade of a utility knife is critical to sustaining its effectiveness. The majority of utility knives are made with an ease-of-use blade replacement system, either snap-in or screw-on. Worn out or damaged blades can easily be swapped out for new ones. Blades come in various types, each made for a particular type of cut, be it paper, cardboard, or even thicker materials. Frequent replacement makes sure that the knife is kept sharp and maximum effective, which extends the life of the knife and its cutting ability over time. Users can also interchange blades based on the type of material they will be working on.