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. Our 4-wheel system gives you more balance and stability for your abdominal exercises. Our 4-wheel system also doubles as a push up stand. More Balance More balance helps, especially as you stretch further away. Burn calories and build muscle with Ab Roller. Wear Proof Wear Proof and provide excellent overall rolling motion stability. Perfect fitness system for beginners and advance use challenging difficult variations. Anti Skid The textured wheels are skid resistant and grippy, promotes stability and control. Solid core is molded and very firm. Strong Handle The comfortable grips minimize hand fatigue while remaining slip-free even in the sweatiest workout, leave all your effort on the ground.