Portable and perfect for use at home, gym or office The enlarged two-wheel design makes the movement more stable while reducing the swing of the abdominal wheel. The auto rebound function also helps protect you from injuries during your workout The caster wheel is made of multiple layers of materials, including anti-skid layer, reinforcing layer, damping layer, mute layer, and noise reduction layers. It helps to tighten and shape the muscles of the arms, chest, abdomen, back, hips and legs, and helps to burn fat faster and shape the abdominal muscles The detachable handle has thick foam for comfortable grip, sweat absorption and easy storage Thickened sponge pad protects the elbow, which does not damage the elbow during long-time exercise