... slip rubber feet Protective foam High density foam grips Quick Details Place of Origin:Zhejiang China (Mainland)Brand ... and it works as a set of push up bars, idea for strengthening and toning the chest, shoulders and ... frame, allowing you to placed your feet underneath for sit-ups, crunches and other abdominal exercises.Door ... it off the door when you want to do push ups or sit-ups, It is so versatile, ...