I bought this after seeing a similar one at my son's house. I realized how it uses rotational force and doesn't damage the wall or door frame. It was easy to install and is very sturdy. I work from home, so I use it multiple times per day just to hang. Started off with 20 seconds at a time, now easily up to 40. Started with only being able to do 3 pull up, now up to 6. I do these same exercises at the gym but it's so nice just to be able to do them anytime now. If you want to work on your grip strength and upper body, this is a no brainer.
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