Press the grey button on Oxo's locking can opener and it will open up, exposing the stainless steel blade so you can easily slide a can in. Close the can opener and it will smoothly open your can with the easy twist of an over sized knob. You'll be sure you've got the can situated correctly because the open window lets you gaze upon the action. With a magnetic lid catch, this can opener has truly mastered the can opening ideal. Satisfaction guaranteed.