Quality materials and build Twister Arm Trainer uses high-strength metal springs and anti-slip foam handles. The foam-wrapped exterior provides durability and comfort, delivering smooth, stable workouts while minimizing injury risk, even during intense training sessions. Full upper body workout Designed for effective upper body exercises, this strength rod targets multiple muscle groups including chest, arms, biceps, abs, shoulders, and back. It provides stimulation and exercise to help build explosive power and sculpt an athletic physique. Adjustable intensity Three resistance levels: 66 lbs, 88 lbs, and 100 lbs. Suitable for users at any fitness level; customize resistance to reach your specific training goals. Portable and detachable Lightweight and collapsible, it fits under beds or in luggage. Ideal for home gyms, travel, or office workouts. Detachable parts and easy assembly let you maintain fitness routines anywhere without sacrificing space. Use scenarios For home workouts, use this trainer to perform quick upper body sessions or integrated routines. When traveling or in the office, packable and easy to assemble, it fits hotel rooms or small spaces for on-the-go training. Use during breaks to maintain consistency and relieve shoulder and arm tension.