Perfect Fitness Multi-Gym Doorway Pull Up Bar and Portable Gym System by EWORLD

Iron Gym is the multi function training
bar that combines every exercise you need to build a powerful upper body. Its
the ultimate body sculpting and strength building tool that helps shape the
upper body and tones your midsection. Strengthen your back, biceps, and other
upper body muscles in the comfort of your living room or dorm with the Iron Gym
workout bar. Designed to fit conveniently in most doorway frames or sit on the
floor for pushups, dips, and sit-ups, the Iron Gym is an ideal choice for
people who want to get fit without buying expensive, space-intensive weight
sets. When installed in the doorway, the device lets you perform pull-ups and
chin-ups, with three grip positions--narrow, neutral, and wide--for working the
inner and outer back. Once you're done with your back workout, you can quickly
move the Iron Gym to the floor, where you can perform pushups while facing
down, tricep dips while facing the other way, or sit-ups using the Iron Gym for
foot stability. 

3 reverse dips, 4 sit ups please