Sports Research Sweet Sweat Ab Wheel
I've owned a few of these types of things over the years and this is quite a good one. The wide wheel is very stable and helps when turning. These always do more for your body than you expect them to. A critical part of my workout and easy to pack
The Abdominal Exercise Wheel strengthens and tones abs, arms and back. The removable handles make it portable, an excellent gift for someone who likes to excercise at home, or whilst travelling.