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 and 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 and 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. Colour:A:Blue or B:Red or C:Grey Material:Metal Package Contents: 1 x Twister Arm Trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.