The set screw cannot be adjusted to work with a sheet metal access panel. The screw does not reach far enough to secure the door. There is 1/4 inch play. I think it can be fixed by going to a hardware store and buying a longer locking screw. Just take a look. I will say that the bar feels very strong and strong. I have updated the rating from 2 to 4 stars. Whilst all comments are still correct I must say that this product is true to size and I have not researched in enough detail to ensure it will work with a thin metal plate door latch.