Product review (5 stars): Give this one a try!
Was doubtful at first if the key would work.  My freezer is about 25 years old but I felt that it was a OEM part so I gave it a try.  To my surprise, it worked perfectly.  The only thing was I have arthritis in my hands and it was hard for me to press and turn the key.  My wonderful husband came up with an idea to take the plastic handle of an old tool, like a screw driver, cut it with a hacksaw, cut a notch in the top, and place the key in the notch.  We taped the key in place and I love the handle as it allows easy use of the key.