Anti Skid Abdominal Ab Four Roller Exercise Wheel with Knee Mat for Stomach Exercise Training This is a Ab Roller Wheel Multi Abdominal Core Exerciser Carving System for Fitness Training, Toning Back and Arms Exercise. Premium materials and construction : unlike exercise equipment, our ab wheel is highly durable; an included foam knee pad provides comfort. Provide excellent overall rolling motion stability. Perfect fitness system for beginners and advance use challenging difficult variations. The comfortable grips minimize hand fatigue while remaining slip-free even in the sweatiest workout, leave all your effort on the ground! Unlike other cheap Ab roller, this Carving System is build with solid materials to Last, Perform and get people workout. With this fitness ab equipment for abs, building a set of abs of steel just became a whole lot easier. How to use: Position the abs roller before the knees. Grab the handles with the hands and extend. Lean the body forward as the arms extend forward, supporting it with the abs roller. Roll the abs roller for maximum distance between hands and knees. Slowly roll the abs roller back towards your knees. Strong Handle The comfortable grips minimize hand fatigue while remaining slip-free even in the sweatiest workout, leave all your effort on the ground.