ZMG Foldable Ab Roller Portable Abdominal Wheel Strengthen Core Muscle Training Equipment With Knee Pad STEADY: Re-design of the traditional ab wheel in a triangular frame , dual wheels and larger size back wheel, provide greater stability than normal AB roller,reduce risk of injury,perfect choice for veterans and beginners. PORTABLE: Detachable and foldable design,Makes the AB Wheel Compact and Portable. ab exercise at home.office and anywhere.Very Convenient for Traveling and storage. MULTIFUNCTIONAL: Workout with Ab wheel roller for full body exercise, strengthen & tone abs, shoulders, arms, and back. best Ab exercise equipment.from beginner to advanced, home or gym. Portable and popular - makes a great gift. FREE BONUS GIFTS:Each purchase includes A comfortable knee pad for added knee support (value: $10) ZMG GUARANTEE: We provide high quality products and perfect service,take responsibility for any product quality problem!