Body Solid Powerline PAB21X Easily and safely achieve a toned and tight 6-pack and obliques with full range abdominal resistance while performing sit-ups and crunches. Our specially designed curved back places you in an automatic pre-stretch position for maximum comfort and efficiency. The back pad is infinitely adjustable to accommodate all sizes for a customized and safe workout. You can also perform tricep extensions effortlessly on this ab bench. The ball bearing pulley, with its extra-wide and sealed design, allows for smooth operation and freedom of movement. Plus, it's lightweight and easy to move. Body-Solid Powerline PAB21X Key Features Features full range abdominal resistance. Full range motion starts at 30 degrees back of center to 30 degrees forward of center for a full range of exercise motion. Curved back pad puts you in a pre-stretch position that allows more intense abdominal contraction. You will get twice the results in half the time with a lot less work. Extra-wide, sealed ball bearing pulley allows complete freedom of movement for oblique workouts as well. Infinitely adjustable back pad ensures quick and easy adjustment for all size users. Excellent for tricep extensions too.