A door frame pull up bar is an easy addition to any home workout routine because of its conveniency and its chameleon-like ability to be used for far more exercises than just the standard pull up. It is recommended you use the P90X pullup bar for a variety of different back exercises. It will install in most door frames without being permanent and it will not cause damage. If you are handy, you can make your own pullup bar by simply using a thick pipe and two pipe support brackets to mount the bar in a doorway. I have recently purchased a door way pull-up bar, however the trim on one side (referred to hereafter as the back side) is not thick enough for the pull-up bar’s (unable to find official nomencla. Below is a picture showing how the pull-up bar mounts in a door frame.
Top 5 Best Door Frame Pull Up Bars