Sliding patio door handles. 9.5 by 1

Thanks for posting. This handle set reminds me of our 82-086; however, if the door won't even open, this could get tricky, because it means your door's internal mortise lock might be broken. Remove the handle set, and then try manually flipping the mortise lock with a 'flathead screwdriver'. If you can get the mortise lock to flip and unlock the door, then you should be OK just replacing the handle set. If, however, you cannot get the mortise lock to budge, you may need to bring in a pro to cut open a hole to remove the mortise lock. There, unfortunately, may not be any way around this. Apologies for the inconvenience. 

Thanks for getting back to me. OK, take a look at our 82-265 Double Mortise Lock, as well as the 82-249 Keeper.