SLIDES UNDER DOOR - The Sit-up bar slides easily under the door and tightens on with a clamp to fit any size doors for your home workouts. 3 ADJUSTABLE HEIGHTS - The ankle rests can be adjusted to suit the height you require for the perfect sit-up and crunch positions and technique. PADDED FOOT AND ANKLE RESTS - The Sit Up Bar has Neoprene-Padded footrests for extra comfort and support on your ankles. FOAM PADS FOR DOOR - No details forgotten, The Door Sit-Up bar has a padded clamp on the sit up bar so they will not damage your doors. QUICK RELEASE - Excellent design with a quick release oversized screw on the clamp. Easy to fit on any door and easy to remove and store away.