MAXIMUM STABILITY: Extra-wide wheel design, increase balance and stability, you can now train anywhere, even on smooth floors, to tone and build your abs, back, shoulders and arms.MORE SAFETY: Stainless steel framework and rubber base, sweatproof foam handles, TPE materials minimum the sounds in rolling, 600lbs maximum load-bearing!BONUS WORKOUT MAT: A high quality knee mat is included in the package along with the abdominal wheel so you can finally say “goodbye” to bruised knees. The kneeling mat is made from high density EVA foam to provide maximum protection and comfort for your knees.GREAT FOR ALL FITNESS LEVELS: Strengthen and tone your upper abs, lower abs, obliques and entire core! Appropriate for all fitness levels, beginner to advanced!FOREVER FRIENDLY SERVICE: We believe in and stand by our ab wheel for quality, each item is ensured with 3-year gurantee and a bonus knee pad, any problems feel free to contact us and we'll offer help until you are satisfied.