Tone and strengthen your arm, shoulder and core muscles with the Body Solid(R) Ab Wheel, featuring a lightweight dual-wheel design for added stability and maneuverability. Total Core Workout Unique design forces you to isolate the stomach and oblique muscles while you work out Helps to tone and strengthen abdominal, arm and shoulder muscles Safety and Stability Lightweight dual-wheel design increases stability Contoured rubber hand grips ensure safety and offer comfort Portable design for easy transport and storage Additional Details Manufacturer's Warranty: 30 days