A strong, functional torso requires well-defined abdominals and lower back. A successful workout of these complex muscle groups demands a routine built upon a foundation of consistency. Body-Solid's ProDual Ab Crunch Back Extension features a unique rotation position that provides correct, a crunch-style movement for maximum abdominal contraction. The adjustable seat and foot hold-down rollers permit ergonomically correct pivot positioning.Key FeaturesWith gracefully curved frames constructed from sleek, powder-coated tubing that exhibits a modern, design-forward aesthetic, the ProDual Ab Crunch Back Extension builds form into function and value into a superior modular strength training system.Best of all, you can buy with confidence, because the ProDual Ab Crunch Back Extension is built to last a lifetime and is backed by the strongest warranty in the industry!The Body-Solid ProDual Ab Crunch Back Extension lets you use your gut instincts to build a stronger core.Specifications Dual function oversized 9" diameter adjustable roller pad for comfort in use and proper alignment for both ab and back exercises. Biomechanically angled seat with 5 gas-assisted adjustable positions is user-adjustable to achieve proper pivot point for exercise. 6-position adjustable leg pad/foot brace provides stability for users of all heights. Includes a 210 lb. weight stack with a 310 lb. weight stack option. Works as a modular component on the ProDual 3-Stack and 4-Stack Gyms. Assembled Dimensions: 130cm (L) x 109cm (W) x 158cm (H) Assembled Weight: 215.91kg