Only 2
I can only do two chin ups...but I can do 3 sets of 12 modified chin ups using this piece of equipment that I have. I think I need to work my back & arms more if I want to increase. The contest I referred to in my first post was using this equipment and I think the guy that won did 80+ (this is a modified pull up, with your feet on the ground and you lie in between the bars and pull yourself up). It looks easier than it is, trust me that you will feel the burn if you try it.