Ab Roller Wheel for Core Workouts, Built in Resistance, Ab Wheel Roller for Home★ Ab roller acts as your personal fitness trainer - helping you to build stronger and bigger six pack abs, burn calories, build muscle and improve your overall endurance. ★ Interior kinetic engine uses a carbon steel spring to provide resistance and amplify abdominal and arm workout. ★ Ultra wide wheel tread offers stability when carving left, right or center for ed work on obliques.DO NOT use if you are over 300 lbs. ★ Ergonomic hand grips are angled to activate arm and core muscles; Handles are removable for easy storage and transport. ★ Excellent value for money, free knee pad, easy to install, unlimited scenes, available at home, office, gym, simple exercise, efficient results. Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.