Core Strength Equipment: This exercise bar is the must-have training accessory designed for ab and stomach workouts; Attach it to any door at home to reach your fitness goals. Stability + Comfort: The reinforced steel structure provides you with maximum stability, and control, while the bar’s foam padding increases user’s comfort while performing ab exercises. Quick + Easy Set Up: Simply attach rubber stoppers to the bar, then slide the bar under any door, then tighten the padded, rubber clamp until the bar is securely fastened. Universal Fit: It’s durable steel construction offers long-lasting use, and its compact size makes it easy to travel with and attach to any sized door; Dimensions are 4 x12.5 x 7.25 inches. Adjustable: Insert screw knob to the top of the bar; If a tighter fit is needed, then insert the screw knob from the bottom side of the bar.