This door bar is not screwed between the door posts, but you clamp it to the top of the frame and hang from it with your body weight. Simply remove it again after training.
The door bar has different grip positions for pull-ups.
However, it can also be used as a push-up bar, sit-up bar or dip training.
The door bar is designed for door frames with a width of 70-78 cm and a depth of 1-16 cm.