Work your abs with the Sit‎‐Up Bench LWH-1008B This unit sits solidly on the floor‎,‎ providing maximum stability‎ with comfortable cushion pad seating surface and easy to adjust for multiple heights and ankle rest, The curve adds several inches to your extension, more easily emphasizing lower abdominal muscles and building the abs you want in less time. Soft foam rollers protect your knees and ankles.