Twist Arm Strengthener: This energy is specifically designed to train the arms, chest, shoulders, back, biceps, back muscles, waist, neck muscles and the entire upper body. The rotating inner rod exercises your arm and wrist comfortable manner.Quality & Reliable: Made of steel material with high tensile strength, which is high tensile strength, eco friendly, sturdy, and not easy to snap.Design: With 180 degree rotating resistance arm strength and a comfortable grip feel, you can achieve maximum resistance throughout your workout.Compact & Convenient: Lightweight and portable with a simple structure; its compact design makes it easy to carry to the office, gym or while camping or traveling for exercise anytime anywhere.Suitable for Everyone: Upper body workouts are suitable for teenagers, adults, beginners, exercisers and coaches alike. Choose according to your strength level. It also makes an gift choice for family members and friends on birthdays or holidays. Size Chart: 42cmx12cmx3cm/16.54inchx4.72inchx1.18inch Package Includes: 1Arm Exerciser Note: Please allow slightly errors due to manual measurement and different monitors.