1. Turn ratchet-wheel dial counter-clockwise to loosen locking mechanism.

2. Slide blade carefull forward so you can grab it to pull out once step 3 is completed.

3. Remove brass wheel, plastic washer holding your finger on the brass screw at the back of the knife.

4. Next carefully remove the brass screw and pull the blade out carefully and properly dispose of.

5. Load a new blade into the handle all the way.

6. Place brass screw up through the handle and blade so you can then place the plastic washer on the screw followed by the brass wheel and tighten it clockwise.