Zoldir Best Heavy Duty Doorway Sit-Up Bar Exerciser Body Muscle Strength Fitness Weight. 100% Satisfaction and! Made of strong steel plate and tube with rubber padded clamp Firmly fixes to the door, with thick rubber foam for an easy & comfortable work out. Door way sit up bar for sit-ups & ab exercises Helps build stomach muscles for a flatter, slimmer look The heavy-duty foot bar adjusts to 3 different positions