Please can you help me find what these are called. We have small doors in the loft room to get into the storage part. The doors swing freely both ways and the wind means they are swinging open and making a draft. I'm looking for magnetic catches to attach to inside of door and inside of wall so it would need an overhang on the wall part for the magnet to stick to. Like this but with an overhang..., but I can't find them as I don't know what they're called. Help please