That reminds me of our wall (made of solid gypsum wallboard) did not seem very robust, so I could not buy pull-up bar with drills, but hold only after a degradable solution out. Said and done. When Powederbar 2 I ended up and am completely satisfied. The design is smart and very easy to use. It works from the two mount and hanging the hook on the door. Here one must watch out that the "rubber feet" are created in the correct position at the door top. Then the rod keeps very well. The bar is very stable (1,83 m tall / 76 kg) and can certainly carry higher weights; notice if the door frame is sturdy enough. And if you no longer trained, they can be broken down very quickly and easily. What I particularly like is the increased 2nd rod. When my size is very helpful, otherwise your knees would hit the ground. That part is highly recommended ....