Pull up bar for doorway

Pull up bar for doorway. 26 inches long at start. Expands by twisting the bar. 2 plates screw into door frame. 3 of the original 6 screws. My son is 6'5". We needed to install a ceiling mount for him. I do not know the maximum length. We only used it in a standard 30 inch width door. This was screwed into a wood door frame with wood framing behind the door for maximum security. Sold as is. Use at your own discretion/risk.