Adjustable Resistance: The Twister Arm Trainer offers 40-100lb adjustable spring resistance, allowing you to tailor your workout to your fitness level and goals for effective chest, shoulder, and arm muscle training. Portable & Detachable Design: This compact and lightweight fitness tool is designed for convenience. Its detachable springs make it easy to store and carry, perfect for home workouts, travel, or outdoor fitness sessions. Versatile Workout Equipment: Ideal for a variety of exercises, including arm twisting, chest presses, shoulder rotations, and more. It helps improve strength, endurance, and muscle tone in the arms, shoulders, and chest. Durability & High-Quality Construction: Built with premium materials, the Arm Trainer is designed for long-lasting durability and consistent performance, ensuring reliable results during your fitness routine. Convenient for Home or On-the-Go Fitness: Whether at home, in the gym, or while traveling, this portable arm trainer is an excellent tool for enhancing your fitness routine anywhere. Ideal for those looking for an efficient workout solution with minimal space. Color: Blue, Red, Grey Material: Metal Package Contents: 1 x Twister Arm Trainer Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3cm.