The ultimate core trainer, the ROCK 360 uses an innovative, patented ball-bearing system that allows users a 360 degree range of motion without restricting their movement. The functional concept of ROCK 360 is based on the old-age ab wheel, but with a contemporary spin. Take your core on a 360 degree ride at your own pace, speed, and ability. The 360 degree range of motion allows for superior movement working all six major abdominal muscles. Don't settle for straight lines. ROCK multi-directional movements - forming numbers, letters, and shapes - allowing you to work your entire core at the same time! Isolate and work your obliques by moving side to side! The ROCK 360 is so much more than an ab wheel, it's truly a Total Ab Gym that's going to take your abs to the next level.