Question about Elani Pull up bar for door frame

Didn't damage mine either. I have wooden door frames. The pads on the ends have a nicely large surface area which both spread the load (so they leave no imprints) and make sure they are nice and secure as you hang on them.

No, so far no damage despite children's gymnastics exercises!

No, everything's ok after several daily exercises Door hams still remain undamaged 😉

No - however, the rod is not clamped in a wooden frame but in the masonry in which the frame is located

Not at all, very high quality.