Elite Sportz Equipment Ab Wheel Rollers - Our Ab Exercise Wheels are Sturdy, Smooth Rolling, and has Non- Slip Handles NO WOBBLY ROLLOUTS WITH OUR ABS ROLLER,you will find the double wheel design provides more stability than a single wheel design. using a better balanced exercise wheel like ours, means you will have more confidence in the exercise itself, and finally the ability to perform a correct rollout that efficiently works your core SMOOTH ROLLING ABS WORKOUT EQUIPMENT THAT WILL LAST A LIFETIME, for such a simple device, it sure packs some punch. this lightweight, smooth rolling and compact ab wheel is as sturdy as they come and it will be the last you ever buy. were positive youll find it smoother than any other ab roller you have ever used OUR AB WHEEL ROLLER COMES FULLY ASSEMBLED AND READY TO GO,our abs roller pro comes fully assembled and ready to go straight out of the box. youll also love the non-slip handles. the handles are really comfortable, and made of a combination of had plastic and softer rubber that provides a nice grip HANDY VIDEO INSTRUCTIONS ON OUR WEBSITE FOR YOUR AB WHEEL WORKOUTS,we also have some very helpful how to videos on our website (URL on packaging) for those that need some video instruction YOU CAN HAVE YOUR MONEY BACK IF THE AB WHEEL ROLLER DOESNT STRENGTHEN AND TONE YOUR CORE FAST, at elite sportz, customer satisfaction is our number 1 priority. If you're not 100% happy with our ab toning wheel, please contact us for your money back