Features: Steel Construction: Our U Shape-Twister Arm Exerciser features a dense and strong steel tube, ensuring durability and safety during high-intensity workouts. Say goodbye to worries about spring breakage and wrist injuries. Adjustables Resistance: The strength can be easily adjusted by adjusting the buckle, and the 3-speed strength can be adjusted freely. Just adjusting the length, resistance can be adjusted Complete Body Exercise System: Tones biceps & triceps, even thighs - Lift Bustline- Define shoulders & chest- Trim your waist line- Shape tights. This lightweight and portable training tool will allow you to build lean muscles without bulking Use for Anyone & Anywhere: Quiet compact design makes it easy to carry and use virtually anywhere. It can be used by any age group, gender and those of all fitness levels to help achieve weight loss and muscle toning goals Get Lean & Fit Fast: With only a few minutes every day, this training tool will help you build muscle strength, tones your body, and lose weight. Lightweight and portable, you can pack it up and bring it with you anywhere Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Size: As picture show Material: Steel spring + foam