Brinks Solid Brass 30mm Keyed Padlock with 5/8in Shackle

iI have a set of French Doors in my kitchen that open onto a screened in porch. The windows on that porch do not have storm windows, only screens. I cover them with heavy tarps in the winter, but it still gets super cold on that porch. My house is 130-years-old and it shifts every new season. Three times during the past winter, the house shifted and the French doors popped open letting in super fridged air in the middle of the night. I thought I was being broken into by robbers!. My dead bolt on the door had to be removed because the house shifted and the dead bolt jammed into the doorframe and I barely got it opened. The regular door lock does not hold well and therefore the doors swing open. I mounted a hasp-lock on the doors and I lock them now with this new lock. It is small enough to not be noticable and it works keeping the doors closed. The only issue I have, is the keys are quite small and sometimes are hard to fit into the lock opening.