DETAILS & CONSTRUCTION:Heavy-duty, durable steel for quality, long-lasting performance - Adjustable back rest allows for versitility for knee raises and ab crunches - Designed to keep back rest in place during exercises - Versatile design allows you to incorporate push-ups, sit ...DETAILS & CONSTRUCTION:Heavy-duty, durable steel for quality, long-lasting performance - Adjustable back rest allows for versitility for knee raises and ab crunches - Designed to keep back rest in place during exercises - Versatile design allows you to incorporate push-ups, sit-ups, chin-ups, triceps dips and verticle knee raises into your workout - Folding dip arms add versatility and clearance for pull-ups - Forearm pads provide comfort and support during exercise - Maximum User Weight Capacity: 300 lbs.