Have this door here ordered, so I thought to come cheaper than those from the hardware store. This is also the case; comparable to the size of costs (especially with the castle) in Regulars Baumarkt significantly more. Visually there is nothing wrong, but as far as the material, well ... Extremely thin sheet at the door and frame make the flap plenty unstable and installation not necessarily easier. The Belchschrauben carelessly used as a hinge do not contribute to the fact that improves the impression of a sloppy technical execution. Gap around the flap door therefore also quite different. The castle itself closes; However, the bolt or its counterpart on the frame are not optimally executed, so that you always have to try only for a while until the flap remains All this probably explains the lower price; in stores these flaps are performed quality and significantly better processed. That should keep in mind one before this buys here. Use another for installation in visible areas or for frequent use in my opinion better.