Black Mountain Products abs wheel offers a dual wheel design for superior balance and functionality. Each roller is designed with a strong and sturdy base for gym and home use. Abs wheels are great for toning abs, building muscle and burning fat. Using the Black Mountain Product’s double abs wheel will allow you to strengthen your core as well as your shoulders, arms and back. Each abs wheel is ready to use out of the box, with no assembly required. All B.M.P. abs rollers come with a lifetime warranty.