Sit up bar-our patented deluxe sit up bar helps build stomach muscles for a flatter, slimmer look. Traditional sit ups, abdominal crunches, leg lifts, and more are made easier with the sit up bar. The heavy duty, padded, no slip foot bar adjusts to 3 different positions. Designed and constructed with a strong and durable alloy frame and bar. The rubber padded clamp won't mar or scratch your door. It fits to any door.