The ab wheel has proven to be an effective exercise tool to develop upper and lower abdominal muscles. Now, it just got upgraded. Not only is the GoFit Go Power Ab Wheel compact, lightweight and easy to use, its premium features simply make it perform better than entry-level ab wheels. And upgraded performance means enhanced and faster results. ¥ Develop more defined and toned ab muscles. ¥ Targets both upper and lower abdominals. ¥ Dual Wheels with wide treads and “grippy” traction surface. ¥ Non-slip ergonomic, soft rubber handle grips. ¥ Heavy duty, clear urethane wheel hubs. ¥ Unit dimensions: Dia. 7" Total width 13" Includes: Go Power Ab Wheel & Training Manual.