Abdominal slant boards enables you to strengthen back muscles, helps relieve back pain and muscle stiffness, targets hips, buttocks, thighs and abs. Various exercises with a slant board can help improve core strength, work the biceps, triceps, pecs and deltoids. The bench can be used with various dumbbells exercises to tone and strengthen the upper body. Offers mulltiple levels of resistance. Warning: This product contains one or more phthalate chemicals known to the state of California to cause birth defects and other reproductive harm. Consumer may return the product for a full refund, including shipping cost for both receipt and return of the product within 15 days of his or her receipt.