EnterSports Ab Rollers, Ab Trainer for Home with Two Knee Mats, Ab Wheel for Abdominal Muscle Training, Ab Exercise Wheels, Suitable for Beginners, Advanced and Professionals3 TIMES WIDER ROLLER Abs Wheel Roller is upgraded with 4,3 width roller, it is 3 times wider than other brand ab wheel rollers and holding up to 600 lbs. It ensures balance and stability while you are doing core workouts, with 2 thicker knee pads you can protect your knees. HUMANIZED DESIGN ABS roller is made out of durable non slip rubber and stainless steel that ensures stability and comfort for your workouts, the ergonomic handles are easy to grab