Well, I have open five watch cases only one I can't open.

I will take that one to the repair shop because I have scratched up the back trying to pry it off.

All the other 5 cases open easily.

It is just that this one particular case in embezzled on or something.  But it is not the tools.

I have removed and replaced straps.

So for me it is great.  The seller even sent me a video to show me how to use the tools when I requested it.

Thanks.