Ab Wheels - Ab Carver, Blaster, Slimmer For Dynamic Strong Core Exercises STRONG CORE: If you've always had a flat mid-section but still weak or simply flat, get this core wheels to tighten it up. Doing several sets per day for a month straight will do wonders for your abs. 13 MINUTES BONUS VIDEO: Forget paper instructions with other products. Our product comes with 13 minutes instructional video (will be emailed to you as soon as you purchase) with a trainer showing you different techniques from easy to hard moves. Regardless of your fitness level, you will find the video very helpful. DYNAMIC CORE WORKOUT: The No. 1 reason why should buy our twin Ab wheel over the competitions is the dynamic nature of the different exercises you could do with them. Since you get two of them in one package, available techniques and exercises is multiplied by 2. Therefore, you can do more sets and reps and even invent your own if it's not listed in our 13 minutes video PORTABLY PRE-ASSEMBLED: Yes, you don't need to assemble anything. It comes pre-assembled. Just rip the box it comes with and you are already blasting your core in no time SATISFACTION GUARANTEED: Our reviews on all Tunalt Fitness products speak for themselves. We respond to emails with 2 hours and will ensure your satisfaction is guaranteed while dealing with us.