Meet the Stamina X Fortress Power Tower: a workout equipment that lets you build strength in your body by doing push ups, pull-ups, sit-ups, and vertical knee raises. It has a Plyo box that can be adjusted from 16″ to 24″. You also get comfortable foam hand grips on pull-up and dip stations.
The Fortress Power Tower allows you to go to work on your abs, legs, arms, and back. More information is available here.