CHIN-UP / PULL-UP BARS: KNOW THE STRESS WEIGHTS & HOW LONG THEY LAST

My main concern with using these chin-up/pull-up bars over the door is one, that the unit will mark up the wall, which the presenter affirms in this video at the 2:15 mark. Two, I don't want any unit to damage any structure of the door and its frame.  And three, I don't want the unit itself to come apart or exposing a weak stress point from overuse.  All it takes is one story to make you cautious about using these portable fitness units.  

The key consideration when buying a chin-up/pull-up bar is to know how much weight they can hold.  

I personally learned from a friend of an incident where he was using an in-home dip equipment that looked more like an old man's walker, but it was an effective dip station.  Least that's what I thought when I tried it.  But about a year later, he had an incident where the station collapsed on him and he fell onto to the floor with full weight distributed directly on the knees.  Ouch.  So, find out what the weight limits are.  Find out how long they last.  If it's two years, at least you're better off knowing that than not; you can take precautions.  Makes no sense to be working out, building muscle, gaining strength only to get an injury from using the station.  Particularly, on a dip rack, some folks will do different kinds of exercises if space permits.  Some will dip with their legs bent.  Some will do leg lifts.  Just be aware of the kinds of movement that your station will allow.   The newer models, like the one seen below, seem to be constructed with safety in mind.  The one here almost looks like it's a one-piece.  It isn't.  They come in several pieces that require assembly.  

The price on these chin-up/pull-up bars is reasonable.  Price alone shouldn't be everything when you're considering your physical health.  Be sure the station is safe, functional, and know its stress weights before you buy it.  The product description for the dip station above says that it supports 350 lbs.  Is that enough?  If you doing leg lifts on it, is the 350-pound stress test exactly what you need?  Write to the owner.  Check it out.