Combo of ab wheel roller tummy trimmer for ab exercises for men women strengthen and tone your abs, shoulders, arms, and back with the dual ab wheel. The unit teams up a pair of non skid wheels and two easygrip handles. To use, simply get on all fours, grab hold of the handles, and glide the wheels back and forth across the floor. At various points during the exercise, youll work every major upper body muscle group as your torso adjusts to the movements. The dual ab wheel comes with an instructional fitness guide. Two nonskid wheels for added stability. Cushioned rubber foam grips for a comfortable grip. Strengthen and tone abs, shoulder, arms and back.Features made of upgrade high quality plastic and spring, much stronger than the old one, durable and difficult to crack, best choice for building up your muscles. Both standing and sitting using are ok. Different using method for different exercise. Ideal for toning strengthening stomach, waist and legs, arms, hips, thighs and works on the tummy at the same time. Tummy exercise sit on a yoga mat with your legs and footing flat on the fixed footrest, holding the handle to do situps. It can consume twice calories than usual situps.Arm waist exercise sit on a yoga mat with your legs bent and footing flat on the fixed footrest. Holding the handle and pull up the spring with your hand.Leg exercise lying on the yoga mat, holding on the handle and footing on the footrest. Legs bent in 90 angle and force forward.