I'm almost positive I can do pull-ups off these things. They are very well machines and the anchor straps were welcomed as an added safety. My speaker holes were a bit wider so I had a friend make a plate for me but I'd highly suggest something similar for a few extra bucks so people get some adjustable options.The mount adjustment is only on a single axis but the plate that screws to your speaker can be turned but I'm not sure it'll work well since you don't have the third axis to pan left right.