Changing the blade in your Irwin ProTouch Utility Knife is a straightforward process. Here are the steps: Retract the Blade: Locate the blade release button on the side of your knife, near the handle. Push the button inwards while simultaneously pushing the blade toward the handle. This retracts the blade into the knife, making it safe to handle. Always follow safety precautions when handling utility knives and be cautious with sharp blades. Remove the Old Blade: Ensure the knife is closed and locked. Find the blade release button (usually marked with an arrow) on the side of the knife. While pressing the button, use your other hand to pull the blade out from the front of the knife. Dispose of the old blade properly. Insert the New Blade: Insert the new blade into the blade holder. Release the blade release button to secure the new blade in place.