[SUPERIOR QUALITY & PORTABLE: The handles are made of stainless steel strong and durable. The AB wheels are made of high-density rubber material to ensure it withstands even the most intense workout sessions which will not damage the floor. MAXIMUM STABLE WITH DUAL WHEELS: Double non-skid rubber wheels for stability slides across any surface without slipping. This double wheel design provides more stability than a single wheel design. A strong core will help you perform a long list of daily movements with greater ease and a reduced risk of injury. It can support up to 800lbs. BONUS WORKOUT MAT: The knee pad is made from high density EVA foam to provide maximum protection and comfort for your knees. PRACTICAL: The Fitness Master Ab Roller builds muscle density and sculpts abdomen waist back shoulder arm & core effectively exercise the muscles and joints help to full body workout and lose weight.]