Here is another chin up bar with multiple grips that lets you push your body harder. The Merax Multi Grips Chin Up Bar has a 2 x 2″ heavy-gauge steel frame and 2 suspension hangers. It can handle users up to 440 lbs. This lets you perform push-ups, pull-ups, tricep dips, vertical knee raises, and a whole lot more.
You can mount this to concrete and brick walls. Sets you back under $70 at this time.