Well. Specifically, the locking mechanism is not unbedigt exactly brilliant: simple mechanism, at least in continuous operation with a puppy at very frequent use (keyword "housebreaking") completely ungeeignet.Dafür there are much better alternatives made of metal, which is also not the "world" more . Costs I'll install this rather nostalgic refuge in a doorway into a chamber where it alone - maybe 2 times a week - can do his service ... ;-)