when closed, it will keep your heat and air conditioning from escaping and keep out weather, insects, birds, & other critters! let them simmer for a nice, tender texture. if your locking system is not in proper working order, it is time to replace it. (269)-363-1764 starts with area code 269. of course there will be more, yes? is the office and exam area clean and organized? condition: brand new in original packaging. as school makes me busy, i hope i can post fairly regularly, because there are a great number of links out in the world, which have been useful to me. 