LAFENI Flawless Fitness Ab Roller Wheel The Flawless Fitness Abdominal Roller Wheel gives you the best core workout and helps strengthen and tone your abs, back, arms and shoulders High Quality Parts built to last. Our Ab Roller Machine is not built with flimsy cheap plastic like most others. Our roller has one solid wheel to provide stability and maximum control with no wobble Instantly target your lower torso, hips and abdominal areas. Great training for Triathletes, Runners, Boxers, Gymnasts or anyone looking to improve their Abs. Two Wheels are Not Better Than One! Our Single Solid Wheel provides more Stability and a better workout then two flimsy plastic wheels any day! 90 Day Warranty. If for any reason you are unsatisfied with your purchase, contact us and we'll take care of it.