This rod depends (almost) in the optimal amount, is solid and super easy to put in the frame and removed again.
Unfortunately, there are a few points that you should definitely consider beforehand. The bar will only fit in the door frame, which almost exactly have the correct dimensions. In the apartment I came from five doors only two in question. And if you then found a door frame with the right dimensions, the door frame and especially the wall must be reasonably solid directly to the door frame in order to withstand the pressure. About my first doorway I had after the first training, a hole in the wall. Above the second frame then after two weeks also. The holes resulting from the pressure exerted by the two small holder on the other side of the door frame on the wall. These qualities are only finger size and distribute all the weight created by the leverage
One can not use naturally mainly in a rented apartment. I have it solved so that I by metal braces or angles that I simply clamp under the holder, distribute the pressure of the holder. In the regard, the manufacturers could optimize the rod still, by installing, for example, would fold pressure distribution.
Four star's anyway because I could not make the device no chins.