*Speed Abs Complete Ab Workout System This simple tool is all you need to keep up core abs, back muscles, shoulder strength and Gluteal muscle. Upper body mainly deltoid muscle, Trapezius, Pectoral muscle, arms and shoulders. Amazing the workout your abs get beyond what you can do with situps, crunchess, and leg lifts. To use on slippery surfaces like wet tiled floors smooth floors as well as carpet. This roller has a much more natural and smooth. GREAT FOR ALL FITNESS LEVELS: This superior strengthening wheel helps build and tone your upper abs, lower abs, obliques, arms, back and core muscles. Get chiseled shoulders, shredded arms and your v-shape back. Appropriate for all fitness levels, beginner to advanced! WIDER WHEEL FOR ADDED STABILITY: Features a wide wheel for extra stability (Our wheel is about 3.55’’ thick). Supports unrestricted movement for workout intensity. No need to Gym, you can do exercise at home! COMFORTABLE GRIPS: The curved right and left-Ergonomically cushioned designed handles to minimize hand fatigue while maximizing control to prevent slippage. FLEXIBLE amp; SOOTHING ROLLING SOUND: PHAT #39;s Abs machine features durable steel coil spring to provides superior resistance (as you roll out) and assistance (as you roll in). And It is very quiet when rotating. ***WWWOTOTPROSURABAYACOM***