Amdahl Gear Dual Ab Wheel with Extra Thick Knee Pad EXCELLENT AB WORKOUTS: EMG results demonstrate that ab rollers are an excellent way to engage and train your core. Why waste your time or risk injury performing countless situps when our ab roller can improve your abdominal and oblique muscles in less time. TRAIN AT HOME OR WHILE TRAVELLING: Unlike bulky gym equipment, the Amdahl Gear Dual Ab Wheel can be used both at home and when travelling. SMOOTH ROLLING AND COMFORTABLE HANDLES: Our high quality padded foam handles fit securely on a metal axle, eliminating wheel wobble while providing extra comfort. THICK KNEE PAD: Our extra thick (.6"/15mm) knee pad, made from the same material as many high end yoga mats, allows you to exercise on hard surfaces without hurting your knees.