Held less than two weeks

The pull-up bar appears quite high from the outside and looks really good. I clamped the device in a doorway between two concrete walls and was able to use it just for two weeks. During this time I was pretty happy until the bar is suddenly (~ 90kg) collapsed under my weight. Inside some thread must be broken through. From this structure I'll keep distance future, because it is too risky. He prefers a more stable concept without screw. The rod was withdrawn without objection and refunded the money.