They are supposed to and apparently work well, they do nothing to stop a thief so the fire safety is all they are good for. https://www.youtube.com/watch?v=2gu

They are supposed to and apparently work well, they do nothing to stop a thief so the fire safety is all they are good for. https://www.youtube.com/watch?v=2guvwQvElA8 https://www.youtube.com/watch?v=2guvwQvElA8